v2.7.3

What's Changed

• Numerous performance optimizations in JSON.generate and JSON.dump (up to 2 times faster).
• Limit the size of ParserError exception messages, only include up to 32 bytes of the unparseable source.
• Fix json-pure's Object#to_json to accept non state arguments
• Fix multiline comment support in json-pure.
• Fix JSON.parse to no longer mutate the argument encoding when passed an ASCII-8BIT string.
• Fix String#to_json to raise on invalid encoding in json-pure.
• Delete code that was based on CVTUTF.
• Use the pure-Ruby generator on TruffleRuby.
• Fix strict mode in json-pure to not break on Integer.

JSON.dump Performance

JSON.dump is now much faster, and on par or faster than alternative implementations:

== Encoding citm_catalog.json (500298 bytes)
ruby 3.4.0preview2 (2024-10-07 master 32c733f57b) +YJIT +PRISM [arm64-darwin23]
Warming up --------------------------------------
        json (2.7.3)   123.000 i/100ms
                  oj   124.000 i/100ms
Calculating -------------------------------------
        json (2.7.3)      1.312k (± 1.8%) i/s  (761.91 μs/i) -      6.642k in   5.062192s
                  oj      1.278k (± 2.0%) i/s  (782.35 μs/i) -      6.448k in   5.046587s

Comparison:
        json (2.7.2):      884.0 i/s
        json (2.7.3):     1312.5 i/s - 1.48x  faster
                  oj:     1278.2 i/s - 1.45x  faster

== Encoding twitter.json (466906 bytes)
ruby 3.4.0preview2 (2024-10-07 master 32c733f57b) +YJIT +PRISM [arm64-darwin23]
Warming up --------------------------------------
        json (2.7.3)   213.000 i/100ms
                  oj   222.000 i/100ms
Calculating -------------------------------------
        json (2.7.3)      2.140k (± 2.8%) i/s  (467.19 μs/i) -     10.863k in   5.079099s
                  oj      2.303k (± 3.2%) i/s  (434.27 μs/i) -     11.544k in   5.018239s

Comparison:
        json (2.7.2):     1250.5 i/s
                  oj:     2302.7 i/s - 1.84x  faster
        json (2.7.3):     2140.5 i/s - 1.71x  faster

Full Changelog: v2.7.2...v2.7.3