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
, the poor performance of GDC 11 is well visible, but while
version 10 did a good optimization.
I did a base 64 experiment on RISCV64 architecture (other than
Intel) with ubuntu-image:
In gdc-11(RISCV64):
ubuntu@ubuntu:~/dlang/benchmark/benchmarks/base64/gdc-11$
gdc-11 -O3 test.d
ubuntu@ubuntu:~/dlang/benchmark/benchmarks/base64/gdc-11$
time ./a.out
encode aaaa... to YWFh...: 1431666688, 20.53
decode YWFh... to aaaa...: 1073741824, 50.37
real 1m11.219s
user 1m10.793s
sys 0m0.171s
______________________________________________________________________________
In gdc-10(RISCv64):
ubuntu@ubuntu:~/dlang/benchmark/benchmarks/base64/gdc-10$
gdc-10 -O3 test.d
ubuntu@ubuntu:~/dlang/benchmark/benchmarks/base64/gdc-10$
time ./a.out
encode aaaa... to YWFh...: 1431666688, 18.48
decode YWFh... to aaaa...: 1073741824, 14.55
real 0m33.447s
user 0m33.108s
sys 0m0.220s
source code from :
https://github.com/kostya/benchmarks/blob/master/base64/test.d
