LLVM Clang 3.9 Mostly Trails GCC In Compiler Performance

Written by Michael Larabel in Software on 13 September 2016 at 08:44 PM EDT. Page 2 of 5. 26 Comments.

With the LAMMPS test GCC 6/7 no longer cleanly built this version of the molecular dynamics simulator, but the GCC 5.4 vs. Clang results are interesting in that it shows both of the latest Clang releases being faster than the still widely-used GCC 5.

But for the FFTW workload, Clang 3.8 and 3.9 were consistently slower than the three tested GCC versions.

Clang 3.8 was faster than Clang 3.9 while that older version was just shy of the GNU Compiler Collection figures for HMMer.

MAFFT was much slower with Clang than GCC.


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