Performance 5x Slower PDFKit Document creation and unresponsive for CJK custom WOFF fonts.

[Saranya-Sivanandham]

Bug Report

Slow PDFKit Document creation and unresponsive, when WOFF type fonts are used.
No performance impact for the same font in TTF

Description of the problem

We are generating 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.And it becomes unresponsive in Firefox. However, for other languages, it is way less ~ around 1 -2 seconds.

With TTF it works better without any issues

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

Your environment

• pdfkit version: 0.12.10
• Node version: 18
• Browser version (if applicable): Chrome Delay is seen but in Firefox it becomes unresponsive.
• Operating System: Windows

[rohinthr]

@Saranya-Sivanandham ,I face the similar issue while using WOFF format.Sometimes its throw error. Better to use TTF font. It will work fine.

[blikblum]

Can you post sample code that shows the difference?

You can fork https://replit.com/@blikblum/minimal-pdfkit or post a complete node script here