js: Add avoidTDZ option

Fixes #7865
This commit is contained in:
Bjørn Erik Pedersen
2020-11-03 09:05:09 +01:00
parent 85e4dd7370
commit 3b2fe3cd33
4 changed files with 24 additions and 1 deletions

View File

@@ -40,6 +40,9 @@ Note that this is meant for small data sets, e.g. config settings. For larger da
minify [bool]
: Let `js.Build` handle the minification.
avoidTDZ {{< new-in "0.78.0" >}}
: There is/was a bug in WebKit with severe performance issue with the tracking of TDZ checks in JavaScriptCore. Enabling this flag removes the TDZ and `const` assignment checks and may improve performance of larger JS codebases until the WebKit fix is in widespread use. See https://bugs.webkit.org/show_bug.cgi?id=199866
target [string]
: The language target.
One of: `es5`, `es2015`, `es2016`, `es2017`, `es2018`, `es2019`, `es2020` or `esnext`.