On Sunday, 19 September 2021 at 19:31:27 UTC, max haughton wrote:
On Sunday, 19 September 2021 at 19:04:28 UTC, Mahdi wrote:
In optimization level 3, gdc11 doesn't seem to work as well as
gdc10 for base 64 benchmark.
On this site:
https://github.com/kostya/benchmarks#base64
[...]
It's because of libphobos not being compiled with inlining due
to the changes to template linkage emission. If you rebuild
Phobos with LTO enabled (if it isn't already) you can get your
performance back.
Compile with LTO and try that.
Thanks
I experimented with lto but it got worse:
ubuntu@ubuntu:~/dlang/benchmark/benchmarks/base64/gdc-11$ gdc-11
-flto -O3 test.d
ubuntu@ubuntu:~/dlang/benchmark/benchmarks/base64/gdc-11$ time
./a.out
encode aaaa... to YWFh...: 1431666688, 20.83
decode YWFh... to aaaa...: 1073741824, 69.34
real 1m30.447s
user 1m29.369s
sys 0m0.191s
