Comment #3 on issue 3903 by [email protected]: Math.log10 is
unexpectedly slow
https://code.google.com/p/v8/issues/detail?id=3903
I'd like to correct my previous comment.
In Chrome 40 we use a polyfill to implement Math.log10, which is why the
performance difference is close to none.
In Chrome 41 we started using the previously linked Javascript port of
fdlibm. The new implementation is more precise, but also a lot slower. It
does some preprocessing before calling to Math.log, which is implemented in
C++.
I wonder whether it makes sense to port fdlibm's log to avoid the call
overhead.
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