Comment #3 on issue 2097 by [email protected]: sha1 compiled with Emscripten runs 10X slower than with SpiderMonkey
http://code.google.com/p/v8/issues/detail?id=2097
I don't think it's a dupe. The code is fully specialized to use typed arrays, which never transition to dictionary mode for elements backing store. And the profile is dominated by arithmetic stubs and non-optimized code (__Z13SHA1TransformPjPKh, _llvm_bswap_i32 which both use unsigned ints).
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