[Freeswitch-dev] V8 Performance Tests

[Michael Giagnocavo]

I don't doubt V8 is great. I'm just saying claiming that it can beat an optimizing C compiler on anything significant sounds a bit strange :)

-Michael

From: freeswitch-dev-bounces at lists.freeswitch.org [mailto:freeswitch-dev-bounces at lists.freeswitch.org] On Behalf Of Jan Berger
Sent: Sunday, July 04, 2010 2:26 AM
To: freeswitch-dev at lists.freeswitch.org
Subject: Re: [Freeswitch-dev] V8 Performance Tests

These tests can be a bit missleading.

Anyway - using the benchmark test on V8's own test below: Try running it on Chrome, and after that you try running it on Opera 10.60

The JavaScript in Opera 10.60 gives a higher score in my laptop.

http://v8.googlecode.com/svn/data/benchmarks/v5/run.html

---

V8 is however really good from an implementation point of view. Using is as a script engine for an app is very straight forward unless you need threaded apps.

V8 is a Multiprocessing by design, but it is not goof on multithreading.

Threaded access to V8 is supported, but you need to lock V8 while access some parts of it (not all) - and it's a bit of work to get this part right.
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From: freeswitch-dev-bounces at lists.freeswitch.org [mailto:freeswitch-dev-bounces at lists.freeswitch.org] On Behalf Of Michael Giagnocavo
Sent: 3. juli 2010 04:59
To: freeswitch-dev at lists.freeswitch.org
Subject: Re: [Freeswitch-dev] V8 Performance Tests

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

From: freeswitch-dev-bounces at lists.freeswitch.org [mailto:freeswitch-dev-bounces at lists.freeswitch.org] On Behalf Of Jan Berger
Sent: Friday, July 02, 2010 5:45 PM
To: freeswitch-dev at lists.freeswitch.org
Subject: [Freeswitch-dev] V8 Performance Tests

Did a quick and dirty performance test comparing C, C++ and V8. This is not a valid benchmark in any way, it is only a test to give me a feeling about how "slow" V8 is compared to pure C and C++.

The code also executed in the same loop and C/C++ tests was in a separate function so all 3 tests had exactly the same overhead in the C++ part.

C : 1,4 Mill/sec
C++: 0.8 Mill/sec
V8 Run Only: 0,8 Mill/Sec
V8 Compile+Run: 0,4 Mill/sec

Other tests will show other differences - this is just an indication that V8 actually might compare with C/C++ performance wise + their memory handling look promissing.

Threads ? They use globals and statics that will not thread that easy if you atteempt to thread V8 itself - I need to experiment and see.

Jan

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