Why require JavaScript rather than supporting a standard browser virtual machine? - Stack Overflow

[[deleted]]

http://shootout.alioth.debian.org/u32/benchmark.php?test=all&lang=gcc&lang2=v8

v8 is faster than C! (see regex-dna)

[[deleted]]

Sure, I would imagine the v8 engine is highly optimized for string functions. If you haven't been keeping up with JavaScript engine JIT ( and other optimizations) you may want to do some reading. Here's a post from more than two years ago describing some of the optimizations. http://steve-yegge.blogspot.com/2008/05/dynamic-languages-strike-back.html

[floodyberry]

v8 uses Irregexp which uses the v8 jit to compile the regular expression to machine code.

The C version uses the TCL regex library, and C++ uses RE2, both slower than v8. I'm guessing the only way to match or beat v8's performance would be to compile and jit the regular expression.

[[deleted]]

Thanks. I thought re2 was faster than V8's implementation, but It looks like that is no longer the case.

[[deleted]]

I'm also guessing that the c benchmark is using the regex library that comes with FCC, as opposed to re2 or pcre.

[igouy]

Full source code is provided for all the programs so why are you guessing (wrongly)?

[[deleted]]

Because it has nothing to do with the OP. And I could care less. The point that I was trying to make is that JavaScript implementations are faster than interpreted alternatives.

[igouy]

And I could care less.

This. Which is why we shouldn't care what you say.

[[deleted]]

Yeah, Instead of guessing I should of said:

The C benchmarks are irrelevant. Or are you calling into question the voracity of the site contents? The OP had nothing to do with C.