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
osh-native-souffle 118,863 12.0

(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 2,782
bash 118,863 703
osh-native 118,863 433
osh-native-souffle 118,863 427
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 4 3 2 3 2,698 Build.sh
osh-native-souffle 7 6 1 8 2,698 Build.sh
osh-native 8 5 3 8 2,698 Build.sh
osh-cpython 267 241 27 21 2,698 Build.sh
dash 2 1 1 1 2,512 abuild
bash 5 4 1 3 2,512 abuild
osh-native-souffle 9 8 1 8 2,512 abuild
osh-native 9 8 1 9 2,512 abuild
osh-cpython 361 345 17 21 2,512 abuild
dash 8 6 2 2 20,489 configure
bash 32 31 2 3 20,489 configure
osh-native-souffle 42 29 13 20 20,489 configure
osh-native 44 36 7 21 20,489 configure
osh-cpython 1,767 1,729 39 42 20,489 configure
dash 21 21 0 2 69,779 configure-coreutils
bash 78 76 2 3 69,779 configure-coreutils
osh-native 155 132 23 52 69,779 configure-coreutils
osh-native-souffle 165 137 27 45 69,779 configure-coreutils
osh-cpython 5,295 5,218 77 86 69,779 configure-coreutils
bash 5 3 2 3 2,029 configure-helper.sh
osh-native-souffle 6 2 4 8 2,029 configure-helper.sh
osh-native 7 5 2 8 2,029 configure-helper.sh
osh-cpython 261 235 26 21 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 4 3 1 3 1,733 functions
osh-native-souffle 6 4 2 8 1,733 functions
osh-native 6 4 3 8 1,733 functions
osh-cpython 252 233 19 20 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 13 6 15 9,661 ltmain.sh
osh-native 20 15 5 15 9,661 ltmain.sh
osh-cpython 841 815 26 28 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 3 2 1 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 4 0 7 1,679 t4014-format-patch.sh
osh-native 4 3 1 7 1,679 t4014-format-patch.sh
osh-cpython 92 75 18 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 2 2 7 3,123 t9300-fast-import.sh
bash 5 4 1 3 3,123 t9300-fast-import.sh
osh-cpython 99 86 13 18 3,123 t9300-fast-import.sh
bash 15 14 1 3 5,160 test-cmd-util.sh
osh-native-souffle 17 12 5 11 5,160 test-cmd-util.sh
osh-native 18 13 6 12 5,160 test-cmd-util.sh
osh-cpython 779 752 27 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 33,370,926 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,903,191 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,993,257 2,512 abuild
osh-native 45,781,394 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 244,784,426 20,489 configure
osh-native 279,073,999 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 833,158,252 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native 904,172,021 69,779 configure-coreutils
osh-native-souffle 26,923,278 2,029 configure-helper.sh
osh-native 30,986,092 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 25,245,508 1,733 functions
bash 28,169,399 1,733 functions
osh-native 29,254,756 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 98,832,938 9,661 ltmain.sh
osh-native 114,597,049 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 10,904,011 1,679 t4014-format-patch.sh
osh-native 11,929,397 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 12,804,046 3,123 t9300-fast-import.sh
osh-native 14,036,062 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 98,908,911 5,160 test-cmd-util.sh
osh-native 113,840,329 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-575101eb
dash dash-0ebcf347
osh-cpython osh-6743128b
osh-native osh-533ca882
osh-native-souffle osh-native-souffle-87cad137
host label host id
no-host no-host-e5b8d3ee

Raw Data

filename
no-host.2024-09-30__04-36-49.cachegrind.tsv
no-host.2024-09-30__04-36-49.times.csv