Fix webpack/react/uglify-es performance regression

Closes: CORE-2126 See my comment on the github thread for details facebook/react#13987 (comment) Test plan: * try canvas in a production environment * all pages that use React components should feel faster Change-Id: I3d9279784ef38bff1342ab6d20bbfefa697c92b2 Reviewed-on: https://gerrit.instructure.com/171633 Tested-by: Jenkins Reviewed-by: Clay Diffrient <[email protected]> QA-Review: Ryan Shaw <[email protected]> Product-Review: Ryan Shaw <[email protected]>
instructure · Nov 8, 2018 · 4d0f3aa · 4d0f3aa
1 parent 98a4d3c
commit 4d0f3aa
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/webpack.production.config.js b/webpack.production.config.js
@@ -28,7 +28,8 @@ if (!process.env.JS_BUILD_NO_UGLIFY) {
       parallel: true,
       uglifyOptions: {
         compress: {
-          sequences: false // prevents it from combining a bunch of statments with ","s so it is easier to set breakpoints
+          sequences: false, // prevents it from combining a bunch of statments with ","s so it is easier to set breakpoints
+          reduce_funcs: false // works around this bug: https://github.com/facebook/react/issues/13987#issuecomment-437100945
         },
         ecma: 5,
         output: {