[Performance][Custom Fonts]Pdfmake download takes 5x longer & hangs in Firefox for custom fonts CJK languages WOFF

[Saranya-Sivanandham]

We are using PDFMake to generate a text-only single-page PDF.
For languages Chinese, Hebrew & Japanese, we are making use of the below Google font in WOFF format downloaded from Google Webfonts helper.

• Chinese - Noto Sans SC (1.5 MB) Download link Choose Historic support to get WOFF format.

• Japanese / Hebrew - M PLUS 1p regular Download link Choose Historic support to get WOFF format.

For the above languages with the mentioned fonts, the pdf download takes around 8 seconds - 11 seconds for a single page. However, for other languages, it is way lesser ~ around 1 -2 seconds.

With TTF it works better.

Note: Unable to upload woff font in GitHub. So shared the link from where I downloaded it.

[Saranya-Sivanandham]

Found the issue is related to fontkit and posted
foliojs/fontkit#321