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- Subject: Re: Intel C/C++ free compilers
- From: Eero Pajarre <epajarre@...>
- Date: Sun, 19 Jan 2003 02:22:30 +0200
Rob Kendrick wrote:
On Fri, Jan 17, 2003 at 06:08:43PM -0200, Euler German wrote:
The thread on C compiler speeds on another list got my attention to the
Intel C/C++ compiler for Windows (trial) and Linux which is free for
non commercial purposes, though unsupported.
I'm wondering if someone used it to build Lua and if he/she notice any
speed gain as it is optimized to Intel platforms. Unfortunately, I have
no Linux machine yet... :(
I tried it with Lua 4, and it made quite a large difference, esp. if you
used the dodgy switches to speed floating point operations. If you've
configured Lua to use ints instead of floating point numbers, I imagine
the speed difference would be greater.
My experience with the Intel Compiler has not been as good.
(Although I only have the 4.5 version of the windows compiler)
It is not the floating point, which might be the strong
area of the Intel compiler, which is the performance problem with
Lua for me, instead profiling and pipeline simulation seem to indicate
that cache misses and unpredictable branches are the CPU eaters with
the Lua VM.
In any case, I will check again because of your results.