GCC 8/9 vs. LLVM Clang 7/8 Compiler Performance On POWER9 With The Raptor Talos II
Written by Michael Larabel in Software on 8 February 2019. Page 4 of 5. 4 Comments

OpenSSL built under GCC surprisingly was surprisingly around 7% faster than Clang, while on Linux x86_64 the performance comes to about the same.

Clang did pick up a few wins in the synthetic Cpp Performance Benchmarks test cases.

The current Clang 7.0.1 stable release also yielded faster performance for Redis.

The memcached mcperf benchmark appears to take a sizable performance hit under the GCC 9 development code.


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