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Phoronix Test Suite

OpenBenchmarking.org

New LLVM Clang Compiler Benchmarks: 3.2, 3.3, 3.4 SVN

Compiler

Published on 15 July 2013 06:06 PM EDT
Written by Michael Larabel in Compiler
3 Comments

From an older Intel Core i7 990X Extreme Edition "Gulftown" system the LLVM/Clang compiler performance of the 3.2 and 3.3 releases were compared to the current SVN code as of today. There are some LLVM 3.4 performance improvements while for other workloads there isn't much evolution to see.

LLVM 3.3 was just released last month and there's still several months until the LLVM 3.4 release is expected, but already there's been changes like using the LLVM Loop Vectorizer at new optimization levels, performance changes, enabling the Radeon R600 LLVM back-end, and also talk of having the SLP Vectorizer on for -O3.

Anyhow, having out the Intel Core i7 990X system for some updated Linux tests, today I ran some LLVM Clang 3.2, 3.3, and 3.4 SVN 20130715 benchmarks for different C/C++ workloads. The results in full can be found on OpenBenchmarking.org within 1307158-SO-LLVM34COM27.


In one of the SciMark 2 tests there is already a great speed improvement out of LLVM/Clang 3.4.

Most workloads don't see any dramatic shifts yet on the in-development LLVM code, but be sure to see the rest of the results. You can also run your own compiler performance comparison using the Phoronix Test Suite.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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