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 13.2
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 2,695
bash 118,863 700
osh-native-souffle 118,863 427
osh-native 118,863 404
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 2 2 3 2,698 Build.sh
osh-native-souffle 8 4 4 8 2,698 Build.sh
osh-native 8 0 8 8 2,698 Build.sh
osh-cpython 280 268 12 21 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 6 6 0 3 2,512 abuild
osh-native-souffle 8 8 0 8 2,512 abuild
osh-native 9 9 0 9 2,512 abuild
osh-cpython 373 357 16 21 2,512 abuild
dash 9 6 3 2 20,489 configure
bash 32 32 0 3 20,489 configure
osh-native-souffle 43 39 4 21 20,489 configure
osh-native 46 42 4 21 20,489 configure
osh-cpython 1,811 1,762 48 42 20,489 configure
dash 21 21 0 1 69,779 configure-coreutils
bash 77 77 0 3 69,779 configure-coreutils
osh-native-souffle 161 137 24 50 69,779 configure-coreutils
osh-native 171 163 8 46 69,779 configure-coreutils
osh-cpython 5,361 5,260 100 86 69,779 configure-coreutils
bash 6 6 0 3 2,029 configure-helper.sh
osh-native-souffle 6 3 3 8 2,029 configure-helper.sh
osh-native 7 0 7 8 2,029 configure-helper.sh
osh-cpython 267 237 29 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 0 6 7 1,733 functions
osh-native 6 6 0 8 1,733 functions
osh-cpython 259 235 24 20 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 17 0 4 9,661 ltmain.sh
osh-native-souffle 21 17 4 15 9,661 ltmain.sh
osh-native 21 21 0 15 9,661 ltmain.sh
osh-cpython 863 826 36 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-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 100 91 8 18 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 0 4 7 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-cpython 106 89 16 18 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 19 15 4 12 5,160 test-cmd-util.sh
osh-cpython 760 740 20 27 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 32,901,307 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,369,148 2,698 Build.sh
dash 7,042,147 2,512 abuild
osh-native-souffle 38,714,018 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native 44,970,448 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,441,821 20,489 configure
osh-native 255,020,538 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,602,350 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native 917,380,339 69,779 configure-coreutils
osh-native-souffle 26,505,019 2,029 configure-helper.sh
osh-native 30,482,328 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,816,024 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,749,391 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,276,906 9,661 ltmain.sh
osh-native 112,750,285 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 10,803,536 1,679 t4014-format-patch.sh
osh-native 11,810,635 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 12,667,298 3,123 t9300-fast-import.sh
osh-native 13,871,294 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,254,527 5,160 test-cmd-util.sh
osh-native 111,867,947 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-a10165e8
dash dash-0ebcf347
osh-cpython osh-cab8546a
osh-native osh-a424cfb8
osh-native-souffle osh-native-souffle-c7e28b9b
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2024-11-18__00-49-03.cachegrind.tsv
no-host.2024-11-18__00-49-03.times.csv