OSH Parser Performance

We time $sh -n $file for various files under various shells, and repeat then run under cachegrind for stable metrics.

Source code: oil/benchmarks/osh-parser.sh

Raw files

Summary

Instructions Per Line (via cachegrind)

Lower numbers are generally better, but each shell recognizes a different language, and OSH uses a more thorough parsing algorithm. In thousands of "I refs".

shell label total lines thousand irefs per line
bash 118,863 15.1
dash 111,674 2.3
osh-native 118,863 13.3

(zsh isn't measured because zsh -n unexpectedly forks.)

Average Parsing Rate, Measured on Two Machines (lines/ms)

Shell startup time is included in the elapsed time measurements, but long files are chosen to minimize its effect.

shell label total lines host no-host
dash 111,674 2,679
bash 118,863 698
osh-native 118,863 406
osh-cpython 118,863 12

Per-File Measurements

Time and Memory

shell label elapsed ms user ms sys ms max rss MB num lines filename
dash 2 2 0 1 2,698 Build.sh
bash 5 5 0 3 2,698 Build.sh
osh-native 9 9 0 8 2,698 Build.sh
osh-cpython 274 262 12 20 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 6 6 0 3 2,512 abuild
osh-native 9 4 4 9 2,512 abuild
osh-cpython 373 340 32 21 2,512 abuild
dash 9 9 0 2 20,489 configure
bash 32 28 4 3 20,489 configure
osh-native 48 36 12 21 20,489 configure
osh-cpython 1,842 1,808 33 42 20,489 configure
dash 21 21 0 2 69,779 configure-coreutils
bash 77 77 0 3 69,779 configure-coreutils
osh-native 166 129 36 51 69,779 configure-coreutils
osh-cpython 5,372 5,295 76 86 69,779 configure-coreutils
bash 6 6 0 3 2,029 configure-helper.sh
osh-native 7 7 0 8 2,029 configure-helper.sh
osh-cpython 262 245 16 20 2,029 configure-helper.sh
dash 1 2 0 1 1,733 functions
bash 4 4 0 3 1,733 functions
osh-native 7 0 7 8 1,733 functions
osh-cpython 258 230 28 20 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 17 0 4 9,661 ltmain.sh
osh-native 21 14 7 15 9,661 ltmain.sh
osh-cpython 869 859 9 28 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 4 0 4 3 1,679 t4014-format-patch.sh
osh-native 4 0 4 7 1,679 t4014-format-patch.sh
osh-cpython 95 63 31 18 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native 4 4 0 7 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-cpython 102 78 23 18 3,123 t9300-fast-import.sh
bash 15 11 4 3 5,160 test-cmd-util.sh
osh-native 18 18 0 12 5,160 test-cmd-util.sh
osh-cpython 778 754 24 26 5,160 test-cmd-util.sh

Instruction Counts

shell label irefs num lines filename
dash 6,416,010 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,900,205 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native 45,786,167 2,512 abuild
dash 53,261,640 20,489 configure
osh-native 279,152,226 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native 904,242,998 69,779 configure-coreutils
osh-native 30,985,821 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
bash 28,169,399 1,733 functions
osh-native 29,253,409 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native 114,619,423 9,661 ltmain.sh
bash 172,930,991 9,661 ltmain.sh
dash 3,166,564 1,679 t4014-format-patch.sh
osh-native 11,929,782 1,679 t4014-format-patch.sh
bash 25,314,918 1,679 t4014-format-patch.sh
dash 4,357,271 3,123 t9300-fast-import.sh
osh-native 14,036,091 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native 113,857,523 5,160 test-cmd-util.sh
bash 161,950,200 5,160 test-cmd-util.sh

Shell and Host Details

shell label shell id
bash bash-0dea3455
dash dash-308ec8e6
osh-cpython osh-a0199432
osh-native osh-a35e1466
host label host id
no-host no-host-13226fd6

Raw Data

filename
no-host.2024-07-17__00-27-12.cachegrind.tsv
no-host.2024-07-17__00-27-12.times.csv