https://bugzilla.wikimedia.org/show_bug.cgi?id=58259
Web browser: ---
Bug ID: 58259
Summary: Use Function rather than $.globalEval to compile
cached JavaScript code
Product: MediaWiki
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: ResourceLoader
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected]
Classification: Unclassified
Mobile Platform: ---
The scope of eval()'d code is determined by the scope in which it was created
and by whether or not the code uses the ES5 strict mode pragma. This makes it
so tricky to analyze that at least one JavaScript engine, V8, declines to
optimize it altogether. The same is not true of JavaScript source compiled via
the Function object constructor, since such code always executes in global
scope.
We should test if Function is faster and use it if so.
See this Wikitech-l thread for context:
<http://www.gossamer-threads.com/lists/wiki/wikitech/414263#414263>.
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