GCC 4.9 vs. GCC 5.1 vs. GCC 6.0 SVN Compiler Benchmarks

[phoronix]

Phoronix: GCC 4.9 vs. GCC 5.1 vs. GCC 6.0 SVN Compiler Benchmarks

Here's some new GCC compiler benchmarks on Linux x86_64 for your viewing pleasure this weekend...

http://www.phoronix.com/scan.php?page=news_item&px=GCC-5.1-6.0-June-SVN

[utack]

Displaying standard deviation everywhere would be nice in these tests, because probablly almost all of the tests have such small difference the result is meaningless for comparison?
Of course in a way that is also a result, it shows not to expect anything great from gcc5.1 if you are only looking for performance numbers.

[Michael]

Displaying standard deviation everywhere would be nice in these tests, because probablly almost all of the tests have such small difference the result is meaningless for comparison?
Of course in a way that is also a result, it shows not to expect anything great from gcc5.1 if you are only looking for performance numbers.

Did you look at the results? The deviation is reported on every single Phoronix result, always.

[jsl.com]

Michael, After you built each compiler did you then build it again with itself before doing the benchmarks?

[mlau]

Michael, After you built each compiler did you then build it again with itself before doing the benchmarks?

GCC already does that. It first builds a "small" version of itself, and then recompiles the codebase with that one.

[oleid]

GCC already does that. It first builds a "small" version of itself, and then recompiles the codebase with that one.

But even if this wasn't the case: the choice of the compiler for compiling the compiler won't change the performance of the binaries at the very end. Only the performance of the compiler while creating them.

[carewolf]

Displaying standard deviation everywhere would be nice in these tests, because probablly almost all of the tests have such small difference the result is meaningless for comparison?
Of course in a way that is also a result, it shows not to expect anything great from gcc5.1 if you are only looking for performance numbers.

Gcc 5 has several significant optimization improvements. They may just not be triggered in these few tests.