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 13.0
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 2,665
bash 118,863 706
osh-native-souffle 118,863 478
osh-native 118,863 444
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 0 2 1 2,698 Build.sh
bash 5 5 0 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 280 236 44 21 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 5 3 3 3 2,512 abuild
osh-native 9 9 0 9 2,512 abuild
osh-native-souffle 9 5 5 8 2,512 abuild
osh-cpython 377 347 28 22 2,512 abuild
dash 8 8 0 2 20,489 configure
bash 32 24 8 3 20,489 configure
osh-native-souffle 41 32 8 21 20,489 configure
osh-native 43 27 16 21 20,489 configure
osh-cpython 1,815 1,766 48 43 20,489 configure
dash 21 18 4 1 69,779 configure-coreutils
bash 77 69 8 3 69,779 configure-coreutils
osh-native-souffle 137 121 16 51 69,779 configure-coreutils
osh-native 148 116 32 50 69,779 configure-coreutils
osh-cpython 5,296 5,215 80 87 69,779 configure-coreutils
bash 5 5 0 3 2,029 configure-helper.sh
osh-native-souffle 6 6 0 8 2,029 configure-helper.sh
osh-native 7 0 7 8 2,029 configure-helper.sh
osh-cpython 269 244 24 21 2,029 configure-helper.sh
dash 1 2 0 1 1,733 functions
bash 4 4 0 3 1,733 functions
osh-native-souffle 6 6 0 8 1,733 functions
osh-native 6 6 0 8 1,733 functions
osh-cpython 257 232 24 21 1,733 functions
dash 5 5 0 2 9,661 ltmain.sh
bash 17 17 0 4 9,661 ltmain.sh
osh-native-souffle 19 15 4 14 9,661 ltmain.sh
osh-native 21 14 7 15 9,661 ltmain.sh
osh-cpython 837 812 24 29 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 3 3 0 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 4 0 7 1,679 t4014-format-patch.sh
osh-native 4 4 0 7 1,679 t4014-format-patch.sh
osh-cpython 103 79 23 19 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 0 4 7 3,123 t9300-fast-import.sh
osh-native 4 4 0 8 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-cpython 110 89 20 19 3,123 t9300-fast-import.sh
bash 15 15 0 3 5,160 test-cmd-util.sh
osh-native-souffle 17 17 0 12 5,160 test-cmd-util.sh
osh-native 18 9 9 12 5,160 test-cmd-util.sh
osh-cpython 761 733 28 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 32,911,005 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,365,980 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,291,386 2,512 abuild
osh-native 44,957,498 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,293,942 20,489 configure
osh-native 275,020,322 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 781,457,011 69,779 configure-coreutils
osh-native 876,680,760 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,495,060 2,029 configure-helper.sh
osh-native 30,470,678 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,807,782 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,740,122 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,255,551 9,661 ltmain.sh
osh-native 112,722,616 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 10,796,401 1,679 t4014-format-patch.sh
osh-native 11,803,143 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 12,659,849 3,123 t9300-fast-import.sh
osh-native 13,863,282 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,259,392 5,160 test-cmd-util.sh
osh-native 111,879,683 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-c1376c85
dash dash-0ebcf347
osh-cpython osh-56019d86
osh-native osh-903ccac4
osh-native-souffle osh-native-souffle-949a0b52
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2025-02-24__00-47-42.cachegrind.tsv
no-host.2025-02-24__00-47-42.times.csv