bm-20241025-azure-x86_64-brandtbucher-justin_no_externs-3.14.0a1+-5791853-pystats-concurrent_imap-vs-base.md

Execution counts

Execution counts for Tier 1 instructions.

The "miss ratio" column shows the percentage of times the instruction executed that it deoptimized. When this happens, the base unspecialized instruction is not counted.

Name	Base Count	Head Count	Change
BINARY_OP_SUBTRACT_FLOAT	306,027	421,023	37.6%
CONTAINS_OP_DICT	630,265	860,631	36.6%
TO_BOOL_LIST	633,030	863,035	36.3%
TO_BOOL_INT	2,142,539	2,909,224	35.8%
LIST_EXTEND	214,976	291,648	35.7%
LOAD_SUPER_ATTR_METHOD	865,098	1,171,788	35.5%
LIST_APPEND	327,133	442,136	35.2%
CALL_METHOD_DESCRIPTOR_FAST	658,792	889,016	34.9%
BINARY_OP	2,869,059	3,865,965	34.7%
COPY_FREE_VARS	893,335	1,200,025	34.3%
CALL_ISINSTANCE	447,599	600,944	34.3%
COMPARE_OP	347,139	462,156	33.1%
LOAD_DEREF	931,148	1,237,838	32.9%
IMPORT_FROM	233,624	310,284	32.8%
BUILD_LIST	700,995	931,011	32.8%
IMPORT_NAME	233,686	310,346	32.8%
UNARY_INVERT	467,851	621,193	32.8%
LOAD_FAST_AND_CLEAR	356,375	471,409	32.3%
FOR_ITER_LIST	717,415	947,465	32.1%
JUMP_FORWARD	600,336	792,338	32.0%
LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES	731,349	961,345	31.4%
GET_ITER	992,726	1,299,431	30.9%
UNARY_NOT	124,387	162,736	30.8%
BUILD_MAP	519,513	672,858	29.5%
CALL_KW_PY	133,554	171,890	28.7%
POP_JUMP_IF_NOT_NONE	1,492,283	1,913,924	28.3%
CALL_NON_PY_GENERAL	3,955,252	5,028,704	27.1%
CALL_BOUND_METHOD_GENERAL	143,626	181,975	26.7%
LOAD_ATTR_METHOD_WITH_VALUES	3,035,085	3,840,543	26.5%
LOAD_GLOBAL_MODULE	7,833,015	9,903,119	26.4%
LOAD_FAST_LOAD_FAST	5,668,789	7,163,402	26.4%
CALL_PY_EXACT_ARGS	5,173,156	6,515,103	25.9%
STORE_ATTR_INSTANCE_VALUE	2,928,658	3,657,713	24.9%
LOAD_ATTR_MODULE	1,398,908	1,743,982	24.7%
POP_JUMP_IF_TRUE	1,256,501	1,563,496	24.4%
LOAD_ATTR	3,927,568	4,886,045	24.4%
RETURN_CONST	4,329,605	5,365,278	23.9%
LOAD_ATTR_PROPERTY	164,181	202,509	23.3%
POP_JUMP_IF_FALSE	7,119,939	8,769,262	23.2%
SWAP	3,178,208	3,868,902	21.7%
LOAD_GLOBAL_BUILTIN	3,419,902	4,148,288	21.3%
STORE_SUBSCR_DICT	1,113,167	1,342,715	20.6%
LOAD_FAST	42,464,026	50,824,282	19.7%
TO_BOOL_BOOL	2,251,651	2,673,961	18.8%
LOAD_ATTR_METHOD_NO_DICT	1,942,518	2,288,153	17.8%
CALL_PY_GENERAL	2,172,010	2,555,793	17.7%
POP_TOP	9,217,218	10,789,619	17.1%
RESUME_CHECK	14,833,983	17,288,447	16.5%
BUILD_TUPLE	1,681,642	1,949,968	16.0%
RETURN_VALUE	13,274,976	15,383,379	15.9%
LOAD_FAST_CHECK	740,836	855,845	15.5%
LOAD_SPECIAL	2,039,942	2,346,658	15.0%
NOP	2,955,216	3,376,496	14.3%
LOAD_ATTR_INSTANCE_VALUE	9,723,940	11,106,910	14.2%
COMPARE_OP_INT	1,764,904	1,994,815	13.0%
CALL_METHOD_DESCRIPTOR_NOARGS	888,152	1,002,922	12.9%
STORE_FAST	13,934,217	15,621,269	12.1%
LOAD_CONST	8,612,708	9,648,396	12.0%
COPY	5,353,228	5,967,272	11.5%
CALL_BUILTIN_CLASS	698,757	775,465	11.0%
INTERPRETER_EXIT	7,116,207	7,767,877	9.2%
CALL_BUILTIN_FAST	425,088	463,462	9.0%
ENTER_EXECUTOR	8,056,307	8,632,866	7.2%
UNPACK_SEQUENCE_TWO_TUPLE	581,145	619,491	6.6%
PUSH_NULL	2,953,629	3,145,379	6.5%
STORE_FAST_STORE_FAST	1,446,388	1,484,734	2.7%
JUMP_BACKWARD_NO_INTERRUPT	4,852	4,770	-1.7%
TO_BOOL_ALWAYS_TRUE	97	98	1.0%
TO_BOOL	66,564	67,057	0.7%
CALL	4,556	4,527	-0.6%
CHECK_EXC_MATCH	13,251	13,168	-0.6%
LOAD_GLOBAL	3,161	3,143	-0.6%
POP_EXCEPT	17,474	17,391	-0.5%
PUSH_EXC_INFO	17,474	17,391	-0.5%
RESUME	474	472	-0.4%
CALL_METHOD_DESCRIPTOR_O	184,617	185,175	0.3%
BINARY_SUBSCR	36,621	36,541	-0.2%
BINARY_OP_ADD_INT	443,390	444,086	0.2%
BINARY_OP_ADD_FLOAT	20,709	20,729	0.1%
BINARY_OP_SUBTRACT_INT	94,456	94,400	-0.1%
JUMP_BACKWARD	44,047	44,073	0.1%
LOAD_ATTR_METHOD_LAZY_DICT	89,325	89,375	0.1%
STORE_SUBSCR	21,483	21,471	-0.1%
UNPACK_SEQUENCE_TUPLE	37,962	37,975	0.0%
STORE_ATTR	61,385	61,373	-0.0%
LOAD_ATTR_CLASS	57,480	57,491	0.0%
POP_JUMP_IF_NONE	300,249	300,306	0.0%
CALL_LEN	149,271	149,295	0.0%
STORE_FAST_LOAD_FAST	26,017	26,021	0.0%
FOR_ITER	22,089	22,092	0.0%
CALL_BOUND_METHOD_EXACT_ARGS	28,687	28,685	-0.0%
CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS	39,010	39,012	0.0%
TO_BOOL_NONE	146,982	146,975	-0.0%
CALL_BUILTIN_FAST_WITH_KEYWORDS	892,597	892,634	0.0%
IS_OP	34,037	34,038	0.0%
CALL_FUNCTION_EX	1,818,649	1,818,662	0.0%
COMPARE_OP_STR	489,419	489,418	-0.0%
YIELD_VALUE	5,067,766	5,067,766	0.0%
MAKE_CELL	105,137	105,137	0.0%
STORE_DEREF	105,107	105,107	0.0%
BINARY_SUBSCR_DICT	84,693	84,693	0.0%
CALL_KW_NON_PY	77,098	77,098	0.0%
DELETE_SUBSCR	67,585	67,585	0.0%
DELETE_ATTR	63,345	63,345	0.0%
CALL_ALLOC_AND_ENTER_INIT	55,468	55,468	0.0%
EXIT_INIT_CHECK	55,466	55,466	0.0%
DICT_MERGE	50,952	50,952	0.0%
BINARY_SUBSCR_TUPLE_INT	43,864	43,864	0.0%
MAKE_FUNCTION	42,873	42,873	0.0%
FORMAT_SIMPLE	38,409	38,409	0.0%
CALL_LIST_APPEND	29,975	29,975	0.0%
BUILD_STRING	29,697	29,697	0.0%
SET_FUNCTION_ATTRIBUTE	29,547	29,547	0.0%
LOAD_ATTR_SLOT	28,763	28,763	0.0%
STORE_ATTR_SLOT	28,680	28,680	0.0%
CALL_BUILTIN_O	26,276	26,276	0.0%
LOAD_SUPER_ATTR_ATTR	23,800	23,800	0.0%
FOR_ITER_RANGE	21,679	21,679	0.0%
BINARY_OP_INPLACE_ADD_UNICODE	20,988	20,988	0.0%
CONVERT_VALUE	17,404	17,404	0.0%
BINARY_SLICE	12,855	12,855	0.0%
RETURN_GENERATOR	12,831	12,831	0.0%
BINARY_SUBSCR_LIST_INT	12,728	12,728	0.0%
RERAISE	12,672	12,672	0.0%
FOR_ITER_TUPLE	9,142	9,142	0.0%
BINARY_OP_MULTIPLY_FLOAT	8,731	8,731	0.0%
BINARY_SUBSCR_STR_INT	8,731	8,731	0.0%
FOR_ITER_GEN	8,502	8,502	0.0%
CALL_STR_1	8,485	8,485	0.0%
END_FOR	8,446	8,446	0.0%
CALL_TUPLE_1	4,396	4,396	0.0%
RAISE_VARARGS	4,227	4,227	0.0%
WITH_EXCEPT_START	4,223	4,223	0.0%
STORE_NAME	742	742	0.0%
BINARY_OP_ADD_UNICODE	368	368	0.0%
LOAD_NAME	195	195	0.0%
CALL_KW	179	179	0.0%
CALL_TYPE_1	152	152	0.0%
UNPACK_SEQUENCE	148	148	0.0%
TO_BOOL_STR	139	139	0.0%
EXTENDED_ARG	129	129	0.0%
CONTAINS_OP_SET	93	93	0.0%
LOAD_SUPER_ATTR	68	68	0.0%
LOAD_BUILD_CLASS	41	41	0.0%
LOAD_LOCALS	37	37	0.0%
COMPARE_OP_FLOAT	15	15	0.0%
CONTAINS_OP	14	14	0.0%
CALL_INTRINSIC_1	14	14	0.0%
LOAD_ATTR_CLASS_WITH_METACLASS_CHECK	12	12	0.0%
STORE_GLOBAL	4	4	0.0%
BINARY_SUBSCR_GETITEM	3	3	0.0%
BUILD_SET	1	1	0.0%
MAP_ADD	1	1	0.0%

Pair counts

Pair counts for top 100 opcode pairs

Pairs of specialized operations that deoptimize and are then followed by the corresponding unspecialized instruction are not counted as pairs.

Not included in comparative output.

Predecessor/Successor Pairs

Top 5 predecessors and successors of each Tier 1 opcode.

This does not include the unspecialized instructions that occur after a specialized instruction deoptimizes.

Not included in comparative output.

Specialization stats

Specialization stats by family

BINARY_OP

specialization stats for BINARY_OP family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	2,867,236	67.6%	3,863,915	72.2%	34.8%
hit ⓘ Specialized instructions that complete.	1,373,986	32.4%	1,488,952	27.8%	8.4%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	1,699	93.2%	1,932	94.2%	13.7%
Success	124	6.8%	118	5.8%	-4.8%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
or	443	26.1%	533	27.6%	20.3%
and int	770	45.3%	914	47.3%	18.7%
remainder	208	12.2%	207	10.7%	-0.5%
add different types	191	11.2%	191	9.9%	0.0%
add other	87	5.1%	87	4.5%	0.0%

BINARY_SLICE

specialization stats for BINARY_SLICE family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	12,855	100.0%	12,855	100.0%	0.0%

BINARY_SUBSCR

specialization stats for BINARY_SUBSCR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	421,496	92.0%	498,168	93.2%	18.2%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	36,326	7.9%	36,244	6.8%	-0.2%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	178	60.3%	180	60.6%	1.1%
Success	117	39.7%	117	39.4%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
buffer int	177	99.4%	179	99.4%	1.1%
list slice	1	0.6%	1	0.6%	0.0%

CALL

specialization stats for CALL family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	16,132,060	100.0%	19,658,484	100.0%	21.9%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	1,201	0.0%	1,185	0.0%	-1.3%
miss ⓘ Specialized instructions that deopt.	517	0.0%	517	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	3,495	100.0%	3,482	100.0%	-0.4%
Failure	0	0.0%	0	0.0%

CALL_KW

specialization stats for CALL_KW family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	41	22.9%	41	22.9%	0.0%

COMPARE_OP

specialization stats for COMPARE_OP family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	346,462	9.4%	461,453	10.9%	33.2%
hit ⓘ Specialized instructions that complete.	3,324,029	90.4%	3,783,945	89.0%	13.8%
miss ⓘ Specialized instructions that deopt.	4,277	0.1%	4,277	0.1%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	409	55.0%	434	56.4%	6.1%
Success	335	45.0%	336	43.6%	0.3%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
float long	208	50.9%	234	53.9%	12.5%
different types	106	25.9%	105	24.2%	-0.9%
big int	95	23.2%	95	21.9%	0.0%

CONTAINS_OP

specialization stats for CONTAINS_OP family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	1,145,852	100.0%	1,414,178	100.0%	23.4%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	7	0.0%	7	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	7	100.0%	7	100.0%	0.0%
Failure	0	0.0%	0	0.0%

FOR_ITER

specialization stats for FOR_ITER family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	5,401,978	99.6%	5,632,028	99.6%	4.3%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	21,788	0.4%	21,788	0.4%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	45	15.0%	48	15.8%	6.7%
Failure	256	85.0%	256	84.2%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
itertools	72	28.1%	72	28.1%	0.0%
callable	69	27.0%	69	27.0%	0.0%
other	50	19.5%	50	19.5%	0.0%
enumerate	50	19.5%	50	19.5%	0.0%
dict items	7	2.7%	7	2.7%	0.0%
dict values	3	1.2%	3	1.2%	0.0%
set	2	0.8%	2	0.8%	0.0%
ascii string	2	0.8%	2	0.8%	0.0%
reversed list	1	0.4%	1	0.4%	0.0%

LOAD_ATTR

specialization stats for LOAD_ATTR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	3,918,280	11.7%	4,876,601	12.3%	24.5%
hit ⓘ Specialized instructions that complete.	29,088,233	87.2%	34,416,206	86.8%	18.3%
miss ⓘ Specialized instructions that deopt.	333,784	1.0%	333,985	0.8%	0.1%
deopt ⓘ Specialized instructions that deopt.	6	0.0%	6	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	4,510	29.5%	4,730	30.6%	4.9%
Success	10,793	70.5%	10,727	69.4%	-0.6%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
overriding descriptor	1,066	23.6%	1,241	26.2%	16.4%
non overriding descriptor	665	14.7%	675	14.3%	1.5%
method	1,347	29.9%	1,347	28.5%	0.0%
non object slot	460	10.2%	460	9.7%	0.0%
class method obj	189	4.2%	189	4.0%	0.0%
mutable class	71	1.6%	71	1.5%	0.0%
not managed dict	45	1.0%	45	1.0%	0.0%
overridden	23	0.5%	23	0.5%	0.0%
metaclass attribute	23	0.5%	23	0.5%	0.0%

LOAD_GLOBAL

specialization stats for LOAD_GLOBAL family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	11,252,643	100.0%	14,051,133	100.0%	24.9%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	815	0.0%	800	0.0%	-1.8%
deopt ⓘ Specialized instructions that deopt.	9	0.0%	9	0.0%	0.0%
miss ⓘ Specialized instructions that deopt.	274	0.0%	274	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	2,355	100.0%	2,352	100.0%	-0.1%
Failure	0	0.0%	0	0.0%

LOAD_SUPER_ATTR

specialization stats for LOAD_SUPER_ATTR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	1,186,267	100.0%	1,607,938	100.0%	35.5%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	13	0.0%	13	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	55	100.0%	55	100.0%	0.0%
Failure	0	0.0%	0	0.0%

STORE_ATTR

specialization stats for STORE_ATTR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	3,348,547	94.3%	4,115,278	95.3%	22.9%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	59,835	1.7%	59,829	1.4%	-0.0%
miss ⓘ Specialized instructions that deopt.	140,654	4.0%	140,654	3.3%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	3,625	86.6%	3,619	86.6%	-0.2%
Failure	561	13.4%	561	13.4%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
property	344	61.3%	344	61.3%	0.0%
class attr simple	163	29.1%	163	29.1%	0.0%
overridden	44	7.8%	44	7.8%	0.0%
not in keys	10	1.8%	10	1.8%	0.0%

STORE_SUBSCR

specialization stats for STORE_SUBSCR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	1,212,290	98.3%	1,480,165	98.6%	22.1%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	21,270	1.7%	21,264	1.4%	-0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	26	12.2%	20	9.7%	-23.1%
Failure	187	87.8%	187	90.3%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
py simple	119	63.6%	119	63.6%	0.0%
other	68	36.4%	68	36.4%	0.0%

TO_BOOL

specialization stats for TO_BOOL family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	7,059,273	99.1%	9,168,394	99.3%	29.9%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	65,590	0.9%	66,078	0.7%	0.7%
miss ⓘ Specialized instructions that deopt.	28	0.0%	28	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Failure	531	54.4%	534	54.4%	0.6%
Success	445	45.6%	447	45.6%	0.4%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
sequence	126	23.7%	130	24.3%	3.2%
mapping	176	33.1%	175	32.8%	-0.6%
tuple	118	22.2%	118	22.1%	0.0%
other	68	12.8%	68	12.7%	0.0%
bytes	43	8.1%	43	8.1%	0.0%

UNPACK_SEQUENCE

specialization stats for UNPACK_SEQUENCE family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	1,955,750	100.0%	2,032,461	100.0%	3.9%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	38	0.0%	38	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	110	100.0%	110	100.0%	0.0%
Failure	0	0.0%	0	0.0%

Specialization effectiveness

specialization effectiveness

All entries are execution counts. Should add up to the total number of Tier 1 instructions executed.

Instructions	Base Count	Base Ratio	Head Count	Head Ratio	Change
Not specialized ⓘ Instructions that could be specialized but aren't, e.g. LOAD_ATTR, BINARY_SLICE.	7,372,889	3.1%	9,443,634	3.3%	28.1%
Specialized hits ⓘ Specialized instructions, e.g. LOAD_ATTR_MODULE that complete.	74,409,936	31.0%	89,828,755	31.7%	20.7%
Basic ⓘ Instructions that are not and cannot be specialized, e.g. LOAD_FAST.	157,481,325	65.7%	183,174,700	64.7%	16.3%
Specialized misses ⓘ Specialized instructions, e.g. LOAD_ATTR_MODULE that deopt.	479,613	0.2%	479,805	0.2%	0.0%

Deferred by instruction

Breakdown of deferred (not specialized) instruction counts by family

Name	Base Count	Base Ratio	Head Count	Head Ratio	Change
BINARY_OP	2,867,236	39.0%	3,863,915	41.0%	34.8%
COMPARE_OP	346,462	4.7%	461,453	4.9%	33.2%
LOAD_ATTR	3,918,280	53.3%	4,876,601	51.8%	24.5%
CALL	1,201	0.0%	1,185	0.0%	-1.3%
TO_BOOL	65,590	0.9%	66,078	0.7%	0.7%
BINARY_SUBSCR	36,326	0.5%	36,244	0.4%	-0.2%
STORE_SUBSCR	21,270	0.3%	21,264	0.2%	-0.0%
STORE_ATTR	59,835	0.8%	59,829	0.6%	-0.0%
FOR_ITER	21,788	0.3%	21,788	0.2%	0.0%
BINARY_SLICE	12,855	0.2%	12,855	0.1%	0.0%

Misses by instruction

Breakdown of misses (specialized deopts) instruction counts by family

Name	Base Count	Base Ratio	Head Count	Head Ratio	Change
LOAD_ATTR_INSTANCE_VALUE	274,244	57.2%	274,453	57.2%	0.1%
LOAD_ATTR_METHOD_WITH_VALUES	49,490	10.3%	49,482	10.3%	-0.0%
STORE_ATTR_INSTANCE_VALUE	140,654	29.3%	140,654	29.3%	0.0%
LOAD_ATTR_PROPERTY	9,895	2.1%	9,895	2.1%	0.0%
COMPARE_OP_INT	4,276	0.9%	4,276	0.9%	0.0%
CALL_METHOD_DESCRIPTOR_NOARGS	269	0.1%	269	0.1%	0.0%
LOAD_GLOBAL_BUILTIN	188	0.0%	188	0.0%	0.0%
CALL_METHOD_DESCRIPTOR_O	144	0.0%	144	0.0%	0.0%
LOAD_ATTR_MODULE	143	0.0%	143	0.0%	0.0%
LOAD_GLOBAL_MODULE	86	0.0%	86	0.0%	0.0%

Call stats

Inlined calls and frame stats

This shows what fraction of calls to Python functions are inlined (i.e. not having a call at the C level) and for those that are not, where the call comes from. The various categories overlap.

Also includes the count of frame objects created.

	Base Count	Base Ratio	Head Count	Head Ratio	Change
Calls via PyEval_EvalFrame (api)	345,171	1.4%	421,825	1.5%	22.2%
Frames pushed	19,127,154	79.2%	22,808,019	81.9%	19.2%
Calls to Python functions inlined	17,031,722	70.5%	20,060,917	72.1%	17.8%
Calls via PyEval_EvalFrame (function vectorcall)	6,693,652	27.7%	7,345,322	26.4%	9.7%
Calls via PyEval_EvalFrame (vector)	6,693,708	27.7%	7,345,378	26.4%	9.7%
Calls to PyEval_EvalDefault	7,120,565	29.5%	7,772,235	27.9%	9.2%
Calls via PyEval_EvalFrame (total)	7,120,565	29.5%	7,772,235	27.9%	9.2%
Frame objects created	17,485	0.1%	17,402	0.1%	-0.5%
Calls via PyEval_EvalFrame (generator)	426,857	1.8%	426,857	1.5%	0.0%
Calls via PyEval_EvalFrame (legacy)	15	0.0%	15	0.0%	0.0%
Calls via PyEval_EvalFrame (build class)	41	0.0%	41	0.0%	0.0%
Calls via PyEval_EvalFrame (slot)	456,471	1.9%	456,471	1.6%	0.0%
Calls via PyEval_EvalFrame (function ex)	441,507	1.8%	441,507	1.6%	0.0%
Calls via PyEval_EvalFrame (method)	2	0.0%	2	0.0%	0.0%

Object stats

Allocations, frees and dict materializatons

Below, "allocations" means "allocations that are not from a freelist". Total allocations = "Allocations from freelist" + "Allocations".

"Inline values" is the number of values arrays inlined into objects.

The cache hit/miss numbers are for the MRO cache, split into dunder and other names.

	Base Count	Base Ratio	Head Count	Head Ratio	Change
Method cache dunder misses	29,403		18,596		-36.8%
Inline values	995,502		1,302,192		30.8%
Method cache hits	6,054,050		7,776,331		28.4%
Interpreter immortal decrefs	48,687,214	13.7%	59,692,534	14.3%	22.6%
Method cache misses	14,994		18,099		20.7%
Interpreter immortal increfs	49,773,396	16.2%	59,933,678	16.7%	20.4%
Allocations from freelist	13,431,615	48.4%	16,077,114	49.8%	19.7%
Frees to freelist	13,434,541		16,079,842		19.7%
Immortal increfs	46,769,097	15.3%	55,769,917	15.5%	19.2%
Interpreter mortal decrefs	129,639,703	36.5%	153,302,343	36.8%	18.3%
Method cache collisions	44,149		36,471		-17.4%
Interpreter mortal increfs	99,168,195	32.3%	116,274,876	32.3%	17.3%
Immortal decrefs	70,933,275	20.0%	83,152,829	20.0%	17.2%
Method cache dunder hits	8,931,070		10,398,618		16.4%
Mortal increfs	110,930,460	36.2%	127,973,343	35.6%	15.4%
Frees	15,135,796		17,282,597		14.2%
Mortal decrefs	105,869,863	29.8%	120,382,071	28.9%	13.7%
Allocations to 512 bytes	14,196,222	51.2%	16,074,413	49.8%	13.2%
Allocations	14,317,578	51.6%	16,195,781	50.2%	13.1%
Allocations to 4 kbytes	77,817	0.3%	77,830	0.2%	0.0%
Allocations over 4 kbytes	43,539	0.2%	43,538	0.1%	-0.0%
Materialize dict (on request)	640	0.1%	640	0.0%	0.0%
Materialize dict (new key)	0	0.0%	0	0.0%
Materialize dict (too big)	0	0.0%	0	0.0%
Materialize dict (str subclass)	0	0.0%	0	0.0%

GC stats

GC collections and effectiveness

Collected/visits gives some measure of efficiency.

Generation	Base Collections	Base Objects collected	Base Object visits	Head Collections	Head Objects collected	Head Object visits
0	0	0	0	0	0	0
1	0	0	0	0	0	0
2	0	0	0	0	0	0

Optimization (Tier 2) stats

statistics about the Tier 2 optimizer

	Base Count	Base Ratio	Head Count	Head Ratio	Change
Traces created ⓘ The number of traces that were successfully created.	348	9.8%	395	10.5%	13.5%
Uops executed ⓘ The total number of uops (micro-operations) that were executed	340,778,060	1,665.2%	386,753,438	1,782.9%	13.5%
Trace stack overflow ⓘ A trace is truncated because it would require more than 5 stack frames.	198	5.6%	216	5.7%	9.1%
Traces executed ⓘ The number of traces that were executed	20,464,279		21,691,968		6.0%
Optimization attempts ⓘ The number of times a potential trace is identified. Specifically, this occurs in the JUMP BACKWARD instruction when the counter reaches a threshold.	3,565		3,762		5.5%
Trace stack underflow ⓘ A potential trace is abandoned because it pops more frames than it pushes.	3,037	85.2%	3,187	84.7%	4.9%
Trace too short ⓘ A potential trace is abandoced because it it too short.	3,019	84.7%	3,151	83.8%	4.4%
Trace too long ⓘ A trace is truncated because it is longer than the instruction buffer.	0	0.0%	0	0.0%
Inner loop found ⓘ A trace is truncated because it has an inner loop	2	0.1%	2	0.1%	0.0%
Recursive call ⓘ A trace is truncated because it has a recursive call.	0	0.0%	0	0.0%
Low confidence ⓘ A trace is abandoned because the likelihood of the jump to top being taken is too low.	0	0.0%	0	0.0%
Executors invalidated ⓘ The number of executors that were invalidated due to watched dictionary changes.	0	0.0%	0	0.0%

	Base Count	Base Ratio	Head Count	Head Ratio	Change
Optimizer successes ⓘ The number of traces that were successfully optimized.	344	98.9%	391	99.0%	13.7%
Optimizer attempts ⓘ The number of times the trace optimizer (_Py_uop_analyze_and_optimize) was run.	348		395		13.5%
Optimizer no memory ⓘ The number of optimizations that failed due to no memory.	0	0.0%	0	0.0%
Remove globals builtins changed ⓘ The builtins changed during optimization	0	0.0%	0	0.0%
Remove globals incorrect keys ⓘ The keys in the globals dictionary aren't what was expected	4	1.1%	4	1.0%	0.0%

Trace length histogram

trace length histogram

Range	Base Count	Base Ratio	Head Count	Head Ratio	Change
<= 1	0	0.0%	0	0.0%
<= 2	0	0.0%	0	0.0%
<= 4	0	0.0%	0	0.0%
<= 8	98	28.2%	105	26.6%	7.1%
<= 16	23	6.6%	37	9.4%	60.9%
<= 32	63	18.1%	70	17.7%	11.1%
<= 64	99	28.4%	124	31.4%	25.3%
<= 128	33	9.5%	27	6.8%	-18.2%
<= 256	31	8.9%	31	7.8%	0.0%
<= 512	1	0.3%	1	0.3%	0.0%

Optimized trace length histogram

optimized trace length histogram

Range	Base Count	Base Ratio	Head Count	Head Ratio	Change
<= 1	0	0.0%	0	0.0%
<= 2	0	0.0%	0	0.0%
<= 4	50	14.4%	51	12.9%	2.0%
<= 8	64	18.4%	77	19.5%	20.3%
<= 16	30	8.6%	37	9.4%	23.3%
<= 32	82	23.6%	106	26.8%	29.3%
<= 64	77	22.1%	79	20.0%	2.6%
<= 128	38	10.9%	38	9.6%	0.0%
<= 256	3	0.9%	3	0.8%	0.0%

Trace run length histogram

trace run length histogram

Range	Base Count	Base Ratio	Head Count	Head Ratio	Change
<= 1	0	0.0%	0	0.0%

Uop execution stats

uop execution stats

Name	Base Count	Head Count	Change
_CALL_LIST_APPEND	99,132	137,481	38.7%
_LOAD_SUPER_ATTR_METHOD	297,369	412,350	38.7%
_INIT_CALL_PY_EXACT_ARGS_3	297,369	412,350	38.7%
_STORE_SUBSCR_DICT	99,123	137,450	38.7%
_TO_BOOL_INT	991,358	1,374,675	38.7%
_COPY_FREE_VARS	297,371	412,352	38.7%
_LOAD_DEREF	297,371	412,352	38.7%
_UNARY_INVERT	495,743	687,425	38.7%
_CALL_ISINSTANCE	297,375	412,356	38.7%
_LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES	297,497	412,525	38.7%
_COMPARE_OP	99,192	137,541	38.7%
_BUILD_LIST	396,735	550,094	38.7%
_INIT_CALL_PY_EXACT_ARGS_1	1,094,716	1,516,353	38.5%
_BINARY_OP	1,594,788	2,208,118	38.5%
_LOAD_ATTR	999,513	1,382,874	38.4%
_CALL_BUILTIN_CLASS	404,512	557,837	37.9%
_LOAD_CONST_INLINE_WITH_NULL	1,123,826	1,545,451	37.5%
_INIT_CALL_PY_EXACT_ARGS	103,165	141,501	37.2%
_LOAD_ATTR_PROPERTY_FRAME	309,677	424,676	37.1%
_BINARY_SUBSCR_LIST_INT	210,560	287,232	36.4%
_RETURN_VALUE	1,518,340	2,055,129	35.4%
_CALL_BUILTIN_FAST	217,112	293,805	35.3%
_COMPARE_OP_INT	546,602	738,267	35.1%
_ITER_NEXT_RANGE	222,939	299,611	34.4%
_TO_BOOL_BOOL	893,411	1,200,222	34.3%
_GUARD_NOT_EXHAUSTED_RANGE	338,706	453,714	34.0%
_ITER_CHECK_RANGE	338,706	453,714	34.0%
_CALL_LEN	113,661	152,002	33.7%
_PY_FRAME_GENERAL	478,227	631,618	32.1%
_RESUME_CHECK	3,349,554	4,422,971	32.0%
_GUARD_DORV_VALUES_INST_ATTR_FROM_DICT	2,675,543	3,519,016	31.5%
_GUARD_KEYS_VERSION	2,675,543	3,519,016	31.5%
_LOAD_ATTR_METHOD_WITH_VALUES	2,378,046	3,106,491	30.6%
_CHECK_STACK_SPACE_OPERAND	1,945,981	2,521,074	29.6%
_SAVE_RETURN_OFFSET	4,075,108	5,263,560	29.2%
_GUARD_IS_FALSE_POP	1,731,277	2,230,488	28.8%
_CHECK_FUNCTION_VERSION	3,761,280	4,834,733	28.5%
_LOAD_CONST_INLINE_BORROW	5,829,289	7,477,140	28.3%
_CALL_METHOD_DESCRIPTOR_NOARGS	136,326	174,710	28.2%
_CHECK_FUNCTION_EXACT_ARGS	3,283,053	4,203,115	28.0%
_CHECK_FUNCTION	3,420,258	4,378,509	28.0%
_LOAD_FAST_1	6,049,184	7,697,415	27.2%
_STORE_FAST_1	1,430,108	1,813,476	26.8%
_STORE_FAST_3	1,341,566	1,686,578	25.7%
_INIT_CALL_PY_EXACT_ARGS_0	1,376,073	1,721,181	25.1%
_GUARD_IS_TRUE_POP	2,381,055	2,916,505	22.5%
_GUARD_NOS_INT	1,057,863	1,287,167	21.7%
_CALL_METHOD_DESCRIPTOR_FAST	907,952	1,098,948	21.0%
_LOAD_FAST_0	9,513,576	11,465,476	20.5%
_LOAD_FAST_3	2,828,141	3,403,169	20.3%
_GUARD_IS_NOT_NONE_POP	1,726,915	2,071,867	20.0%
_STORE_FAST_4	1,733,033	2,078,034	19.9%
_GUARD_TYPE_VERSION	8,225,732	9,834,840	19.6%
_LOAD_CONST_INLINE_BORROW_WITH_NULL	826,783	980,109	18.5%
_LOAD_CONST_INLINE	932,369	1,085,709	16.4%
_LOAD_FAST_6	784,722	899,759	14.7%
_GET_ITER	1,339,858	1,531,549	14.3%
_LOAD_ATTR_INSTANCE_VALUE_0	6,809,871	7,765,016	14.0%
_CHECK_MANAGED_OBJECT_HAS_VALUES	6,826,646	7,781,789	14.0%
_PUSH_FRAME	8,720,348	9,908,800	13.6%
_CHECK_VALIDITY	20,670,031	23,389,492	13.2%
_SET_IP	28,933,422	32,687,980	13.0%
_LOAD_FAST_4	2,465,133	2,771,778	12.4%
_COPY	1,236,794	1,389,477	12.3%
_STORE_FAST_7	637,256	713,974	12.0%
_STORE_FAST_6	637,262	713,980	12.0%
_LOAD_FAST_7	1,306,114	1,459,500	11.7%
_LOAD_FAST_2	8,545,058	9,540,954	11.7%
_POP_TOP	8,169,404	9,088,527	11.3%
_LOAD_ATTR_METHOD_NO_DICT	2,448,976	2,716,011	10.9%
_LOAD_FAST	2,797,883	3,066,248	9.6%
_GUARD_NOT_EXHAUSTED_LIST	6,199,235	6,774,256	9.3%
_ITER_CHECK_LIST	6,199,235	6,774,256	9.3%
_LOAD_FAST_5	1,253,568	1,368,609	9.2%
_SWAP	1,710,916	1,863,683	8.9%
_GUARD_IS_NONE_POP	514,897	553,248	7.4%
_UNPACK_SEQUENCE_TWO_TUPLE	517,350	555,702	7.4%
_EXIT_TRACE	15,076,633	16,189,298	7.4%
_STORE_FAST_5	1,040,967	1,117,646	7.4%
_CONTAINS_OP_DICT	515,490	553,450	7.4%
_COMPARE_OP_STR	527,362	565,703	7.3%
_GUARD_BOTH_UNICODE	527,421	565,762	7.3%
_GUARD_DORV_NO_DICT	531,863	569,539	7.1%
_STORE_ATTR_INSTANCE_VALUE	531,863	569,539	7.1%
_TO_BOOL	555,147	593,383	6.9%
_PUSH_NULL	2,263,973	2,417,321	6.8%
_CHECK_PERIODIC	18,233,970	19,382,201	6.3%
_JUMP_TO_TOP	592,767	629,894	6.3%
_CHECK_VALIDITY_AND_SET_IP	8,128,926	8,627,271	6.1%
_MAKE_WARM	21,057,046	22,321,862	6.0%
_START_EXECUTOR	20,464,279	21,691,968	6.0%
_CALL_NON_PY_GENERAL	2,604,049	2,757,362	5.9%
_CHECK_IS_NOT_PY_CALLABLE	2,604,049	2,757,362	5.9%
_STORE_FAST_2	5,237,926	5,467,265	4.4%
_ITER_NEXT_LIST	4,730,793	4,922,460	4.1%
_BUILD_TUPLE	1,357,428	1,395,777	2.8%
_TIER2_RESUME_CHECK	5,955,521	6,108,496	2.6%
_DYNAMIC_EXIT	5,370,792	5,485,827	2.1%
_STORE_FAST	2,640,622	2,678,971	1.5%
_BINARY_OP_ADD_INT	411,966	411,276	-0.2%
_CALL_METHOD_DESCRIPTOR_O	418,459	417,769	-0.2%
_UNARY_NOT	16,429	16,447	0.1%
_DEOPT	16,854	16,843	-0.1%
_POP_TOP_LOAD_CONST_INLINE_BORROW	44,031	44,039	0.0%
_CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS	11,921	11,919	-0.0%
_LOAD_ATTR_INSTANCE_VALUE_1	16,775	16,773	-0.0%
_FOR_ITER_GEN_FRAME	4,645,240	4,645,240	0.0%
_FOR_ITER_TIER_TWO	918,323	918,323	0.0%
_BUILD_MAP	829,765	829,765	0.0%
_LOAD_SPECIAL	823,550	823,550	0.0%
_UNPACK_SEQUENCE_TUPLE	819,293	819,293	0.0%
_CALL_TUPLE_1	422,270	422,270	0.0%
_CHECK_STACK_SPACE	411,776	411,776	0.0%
_INIT_CALL_PY_EXACT_ARGS_2	411,730	411,730	0.0%
_BINARY_SUBSCR	411,726	411,726	0.0%
_DICT_MERGE	411,718	411,718	0.0%
_LIST_APPEND	61,094	61,094	0.0%
_GUARD_BOTH_FLOAT	60,911	60,911	0.0%
_BINARY_SUBSCR_STR_INT	60,907	60,907	0.0%
_BINARY_OP_MULTIPLY_FLOAT	60,907	60,907	0.0%
_CALL_BUILTIN_O	60,907	60,907	0.0%
_CALL_BUILTIN_FAST_WITH_KEYWORDS	14,341	14,341	0.0%
_GUARD_NOT_EXHAUSTED_TUPLE	8,564	8,564	0.0%
_ITER_CHECK_TUPLE	8,564	8,564	0.0%
_LOAD_CONST	8,302	8,302	0.0%
_CHECK_CALL_BOUND_METHOD_EXACT_ARGS	6,391	6,391	0.0%
_INIT_CALL_BOUND_METHOD_EXACT_ARGS	6,391	6,391	0.0%
_BINARY_OP_SUBTRACT_INT	6,385	6,385	0.0%
_CHECK_ATTR_METHOD_LAZY_DICT	6,385	6,385	0.0%
_LOAD_ATTR_METHOD_LAZY_DICT	6,385	6,385	0.0%
_IMPORT_FROM	4,151	4,151	0.0%
_IMPORT_NAME	4,151	4,151	0.0%
_CHECK_FUNCTION_VERSION_KW	4,151	4,151	0.0%
_PY_FRAME_KW	4,151	4,151	0.0%
_STORE_FAST_0	4,077	4,077	0.0%
_TO_BOOL_STR	191	191	0.0%
_ITER_NEXT_TUPLE	189	189	0.0%
_LOAD_FAST_AND_CLEAR	59	59	0.0%
_BINARY_OP_ADD_UNICODE	59	59	0.0%
_GUARD_BOTH_INT	21	21	0.0%
_BINARY_SUBSCR_DICT	6	6	0.0%
_BINARY_SUBSCR_TUPLE_INT	4	4	0.0%
_CONTAINS_OP_SET	4	4	0.0%
_COMPARE_OP_FLOAT	4	4	0.0%
_LOAD_ATTR_SLOT_0	4	4	0.0%
_MAKE_FUNCTION	2	2	0.0%
_RETURN_GENERATOR	2	2	0.0%
_SET_FUNCTION_ATTRIBUTE	2	2	0.0%
_STORE_DEREF	2	2	0.0%

Pair counts

Pair counts for top 100 Non-JIT uop pairs

Pairs of specialized operations that deoptimize and are then followed by the corresponding unspecialized instruction are not counted as pairs.

Not included in comparative output.

Unsupported opcodes

unsupported opcodes

Opcode	Base Count	Head Count	Change
CALL_FUNCTION_EX	156	156	0.0%

Optimizer errored out with opcode

Optimization stopped after encountering this opcode

Rare events

Counts of rare/unlikely events

Event	Base Count	Head Count	Change
set class ⓘ Setting an object's class, obj.__class__ = ...	0	0
set bases ⓘ Setting the bases of a class, cls.__bases__ = ...	0	0
set eval frame func ⓘ Setting the PEP 523 frame eval function _PyInterpreterState_SetFrameEvalFunc()	0	0
builtin dict ⓘ Modifying the builtins, __builtins__.__dict__[var] = ...	0	0
func modification ⓘ Modifying a function, e.g. func.__defaults__ = ..., etc.	0	0
watched dict modification ⓘ A watched dict has been modified	0	0
watched globals modification ⓘ A watched globals() dict has been modified	0	0

Meta stats

Meta statistics

	Base Count	Head Count	Change
Number of data files	42	42	0.0%

---

Stats gathered on: 2024-10-26