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 13.1
osh-native-souffle 118,863 11.5

(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 2,776
bash 118,863 693
osh-native-souffle 118,863 440
osh-native 118,863 425
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 1 1 1 2,698 Build.sh
bash 5 2 3 3 2,698 Build.sh
osh-native-souffle 7 7 0 8 2,698 Build.sh
osh-native 8 4 4 8 2,698 Build.sh
osh-cpython 286 259 26 21 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 5 4 1 3 2,512 abuild
osh-native 9 5 4 9 2,512 abuild
osh-native-souffle 9 7 2 8 2,512 abuild
osh-cpython 390 365 26 22 2,512 abuild
dash 8 6 2 2 20,489 configure
bash 33 32 1 4 20,489 configure
osh-native 44 35 8 21 20,489 configure
osh-native-souffle 45 34 11 21 20,489 configure
osh-cpython 1,785 1,747 38 43 20,489 configure
dash 21 21 0 1 69,779 configure-coreutils
bash 79 76 3 3 69,779 configure-coreutils
osh-native-souffle 151 124 27 51 69,779 configure-coreutils
osh-native 159 135 23 50 69,779 configure-coreutils
osh-cpython 5,393 5,311 80 87 69,779 configure-coreutils
bash 5 5 1 3 2,029 configure-helper.sh
osh-native-souffle 6 1 5 8 2,029 configure-helper.sh
osh-native 7 4 3 8 2,029 configure-helper.sh
osh-cpython 277 251 26 21 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 4 4 0 3 1,733 functions
osh-native-souffle 6 5 1 8 1,733 functions
osh-native 7 6 1 8 1,733 functions
osh-cpython 271 247 24 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 15 2 4 9,661 ltmain.sh
osh-native-souffle 19 12 8 15 9,661 ltmain.sh
osh-native 21 15 6 15 9,661 ltmain.sh
osh-cpython 876 846 30 29 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
osh-native-souffle 4 1 3 7 1,679 t4014-format-patch.sh
osh-native 4 3 1 7 1,679 t4014-format-patch.sh
bash 4 2 2 3 1,679 t4014-format-patch.sh
osh-cpython 104 82 21 19 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native 4 1 3 8 3,123 t9300-fast-import.sh
osh-native-souffle 4 2 3 7 3,123 t9300-fast-import.sh
bash 5 4 1 3 3,123 t9300-fast-import.sh
osh-cpython 107 84 23 19 3,123 t9300-fast-import.sh
bash 15 14 1 3 5,160 test-cmd-util.sh
osh-native-souffle 17 15 2 12 5,160 test-cmd-util.sh
osh-native 18 13 5 12 5,160 test-cmd-util.sh
osh-cpython 784 759 25 28 5,160 test-cmd-util.sh

Instruction Counts

shell label irefs num lines filename
dash 6,416,010 2,698 Build.sh
osh-native-souffle 32,960,751 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,592,998 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,369,009 2,512 abuild
osh-native 45,313,360 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,560,995 20,489 configure
osh-native 276,258,096 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,334,963 69,779 configure-coreutils
osh-native 880,753,950 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,530,932 2,029 configure-helper.sh
osh-native 30,633,827 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,858,022 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,969,913 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,402,504 9,661 ltmain.sh
osh-native 113,400,320 9,661 ltmain.sh
bash 172,930,991 9,661 ltmain.sh
dash 3,166,564 1,679 t4014-format-patch.sh
osh-native-souffle 10,808,886 1,679 t4014-format-patch.sh
osh-native 11,858,153 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-souffle 12,672,795 3,123 t9300-fast-import.sh
osh-native 13,920,161 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,439,888 5,160 test-cmd-util.sh
osh-native 112,714,743 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-b908c774
dash dash-0ebcf347
osh-cpython osh-70ead910
osh-native osh-0bca97ea
osh-native-souffle osh-native-souffle-fc9d1944
host label host id
no-host no-host-e4839999

Raw Data

filename
no-host.2025-03-01__23-08-54.cachegrind.tsv
no-host.2025-03-01__23-08-54.times.csv