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 11.4

(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 2,649
bash 118,863 690
osh-native-souffle 118,863 443
osh-native 118,863 401
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-souffle 7 7 0 8 2,698 Build.sh
osh-native 8 8 0 8 2,698 Build.sh
osh-cpython 287 255 32 21 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 6 6 0 3 2,512 abuild
osh-native-souffle 9 3 6 8 2,512 abuild
osh-native 10 7 3 8 2,512 abuild
osh-cpython 377 357 20 22 2,512 abuild
dash 9 3 6 2 20,489 configure
bash 33 33 0 3 20,489 configure
osh-native-souffle 44 40 4 21 20,489 configure
osh-native 49 41 7 21 20,489 configure
osh-cpython 1,810 1,773 36 43 20,489 configure
dash 21 21 0 2 69,779 configure-coreutils
bash 79 79 0 3 69,779 configure-coreutils
osh-native-souffle 151 135 16 51 69,779 configure-coreutils
osh-native 168 140 28 50 69,779 configure-coreutils
osh-cpython 5,404 5,323 80 87 69,779 configure-coreutils
bash 6 6 0 3 2,029 configure-helper.sh
osh-native-souffle 6 6 0 8 2,029 configure-helper.sh
osh-native 7 7 0 8 2,029 configure-helper.sh
osh-cpython 279 258 20 21 2,029 configure-helper.sh
dash 2 2 0 1 1,733 functions
bash 4 0 4 3 1,733 functions
osh-native-souffle 6 3 3 8 1,733 functions
osh-native 7 7 0 8 1,733 functions
osh-cpython 267 247 20 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 17 0 4 9,661 ltmain.sh
osh-native-souffle 19 19 0 14 9,661 ltmain.sh
osh-native 21 13 8 15 9,661 ltmain.sh
osh-cpython 844 815 28 29 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 4 4 0 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 4 0 7 1,679 t4014-format-patch.sh
osh-native 4 0 4 7 1,679 t4014-format-patch.sh
osh-cpython 106 81 24 19 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 4 0 7 3,123 t9300-fast-import.sh
osh-native 5 5 0 8 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-cpython 113 101 12 19 3,123 t9300-fast-import.sh
bash 15 11 4 3 5,160 test-cmd-util.sh
osh-native-souffle 17 17 0 12 5,160 test-cmd-util.sh
osh-native 19 14 5 12 5,160 test-cmd-util.sh
osh-cpython 790 757 32 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 32,908,541 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,363,264 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,287,281 2,512 abuild
osh-native 44,954,711 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,286,134 20,489 configure
osh-native 275,013,612 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 772,312,950 69,779 configure-coreutils
osh-native 876,674,525 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,493,590 2,029 configure-helper.sh
osh-native 30,468,882 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,806,220 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,738,438 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,252,268 9,661 ltmain.sh
osh-native 112,718,201 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 10,796,059 1,679 t4014-format-patch.sh
osh-native 11,802,278 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 12,659,031 3,123 t9300-fast-import.sh
osh-native 13,862,402 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,254,741 5,160 test-cmd-util.sh
osh-native 111,866,160 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-8825c4dc
dash dash-0ebcf347
osh-cpython osh-a1e1e490
osh-native osh-e232c0b2
osh-native-souffle osh-native-souffle-7817ca79
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2024-12-31__18-08-41.cachegrind.tsv
no-host.2024-12-31__18-08-41.times.csv