fix(utils): remove lookbehind regexp for better performance - #6236
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@christian-bromann - I wonder if you should add a test - similar to this one https://github.com/stenciljs/core/blob/main/test/wdio/ssr-hydration/cmp.test.tsx#L196 To measure SSR render performance time with a large stylesheet? |
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@johnjenkins added a test for the update. With the original code the time for executing the function has been stable around 2s, now with the patch it is between 3-5ms. |
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hshandilya-cloudflare
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Pull in stenciljs/core#6236 to fix StencilJS generating regular expressions that fail on Safari 16
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Pull in stenciljs/core#6236 to fix StencilJS generating regular expressions that fail on Safari 16
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What is the current behavior?
We have been using a negative look-ahead regexp which turned out to be extremely slow for hydrating components on the fly. This patch optimises the Regexp to be more performant.
GitHub Issue Number: #6226
Documentation
n/a
Does this introduce a breaking change?
Testing
We have extensive unit tests in place for this function.
Other information
n/a