Today, I built vim (git) for x86-64 and for the x32 ABI, with --disable-gui for simplicity. Then, I collected some benchmark results by running make test. (If there are better benchmarks, let me know.) The results show a 10 % speedup for x32 - very cool. I repeated all benchmarks three times for 5 different C compilers (gcc 9, gcc 10, gcc 11, gcc 12, clang-13, all as packaged by Ubuntu 22.04) and the speedup is quite consistent.
compiler user (sec) system (sec)
clang13-64 65.831 16.128
clang13-64 66.131 16.001
clang13-64 65.589 16.050
clang13-x32 61.136 12.583
clang13-x32 61.631 12.387
clang13-x32
61.182 12.315
gcc9-64 66.414
15.806
gcc9-64 67.507 15.940
gcc9-64 67.501 16.158
gcc9-x32 62.375 12.500
gcc9-x32 62.437 12.311
gcc9-x32 62.225 12.175
gcc10-64 67.035 15.894
gcc10-64 67.431 16.096
gcc10-64
67.028 15.790
gcc10-x32 61.796
12.772
gcc10-x32 61.850
12.307
gcc10-x32 61.576 12.916
gcc11-64 66.885 15.842
gcc11-64 66.272 15.556
gcc11-64 66.558 16.139
gcc11-x32 61.940 12.418
gcc11-x32 61.811 12.657
gcc11-x32
61.762 12.429
gcc12-64 67.489
15.473
gcc12-64 67.257
15.750
gcc12-64 66.455 15.779
gcc12-x32 62.361 12.705
gcc12-x32 62.252 12.379
gcc12-x32 61.865 12.31
Greetings
Sven
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