A Closer Look At The GCC 8 Compiler Performance On Intel Skylake
Written by Michael Larabel in Software on 17 May 2018. Page 2 of 2. 12 Comments

With the Himeno pressure solver was another test where the -march=native tuning hard lowered the performance on GCC 8 compared to GCC 7, but at least its performance was still ahead of the generic -O3.

To no surprise, compiling code generally takes longer on GCC 8.1 than GCC 7.3 due to the growing size of the compiler with more optimizations, etc.

C-Ray at -O3 found some nice performance improvements on this Intel Xeon Skylake system with GCC 8.1.

The AOBench performance meanwhile regressed when using the native microarchitecture tuning.

Those wishing to dig through more of these GCC 7.3 vs. GCC 8.1 compiler benchmarks on this Xeon E3 system can find more data via this OpenBenchmarking.org result file. There is also related reading with the GCC 8.1 tests on five AMD/Intel systems and trying Clear Linux with GCC 8.

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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