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

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 12.3

(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 3,895
bash 118,863 1,009
osh-native 118,863 641
osh-cpython 118,863 15

Per-File Measurements

Time and Memory

shell label elapsed ms user ms sys ms max rss MB num lines filename
dash 1 1 0 2 2,698 Build.sh
bash 3 3 0 3 2,698 Build.sh
osh-native 5 5 0 8 2,698 Build.sh
osh-cpython 190 186 4 20 2,698 Build.sh
dash 1 1 0 2 2,512 abuild
bash 4 4 0 3 2,512 abuild
osh-native 6 6 0 9 2,512 abuild
osh-cpython 259 247 12 21 2,512 abuild
dash 7 7 0 2 20,489 configure
bash 22 22 0 4 20,489 configure
osh-native 30 25 4 22 20,489 configure
osh-cpython 1,427 1,407 20 42 20,489 configure
dash 15 11 4 2 69,779 configure-coreutils
bash 55 55 0 3 69,779 configure-coreutils
osh-native 100 92 8 51 69,779 configure-coreutils
osh-cpython 4,409 4,356 52 87 69,779 configure-coreutils
bash 4 4 0 3 2,029 configure-helper.sh
osh-native 4 4 0 8 2,029 configure-helper.sh
osh-cpython 179 175 4 20 2,029 configure-helper.sh
dash 1 1 0 2 1,733 functions
bash 2 2 0 3 1,733 functions
osh-native 5 5 0 8 1,733 functions
osh-cpython 182 162 20 20 1,733 functions
dash 3 3 0 2 9,661 ltmain.sh
bash 13 13 0 4 9,661 ltmain.sh
osh-native 15 11 4 15 9,661 ltmain.sh
osh-cpython 614 605 8 28 9,661 ltmain.sh
dash 1 1 0 2 1,679 t4014-format-patch.sh
bash 2 2 0 3 1,679 t4014-format-patch.sh
osh-native 3 3 0 7 1,679 t4014-format-patch.sh
osh-cpython 64 60 4 18 1,679 t4014-format-patch.sh
dash 1 1 0 2 3,123 t9300-fast-import.sh
osh-native 3 3 0 7 3,123 t9300-fast-import.sh
bash 3 3 0 3 3,123 t9300-fast-import.sh
osh-cpython 65 44 20 18 3,123 t9300-fast-import.sh
bash 10 10 0 3 5,160 test-cmd-util.sh
osh-native 13 10 3 12 5,160 test-cmd-util.sh
osh-cpython 549 533 16 27 5,160 test-cmd-util.sh

Instruction Counts

shell label irefs num lines filename
dash 6,417,905 2,698 Build.sh
bash 35,933,919 2,698 Build.sh
osh-native 38,345,981 2,698 Build.sh
dash 7,043,427 2,512 abuild
bash 43,752,445 2,512 abuild
osh-native 46,305,718 2,512 abuild
dash 53,264,106 20,489 configure
osh-native 263,775,719 20,489 configure
bash 349,528,134 20,489 configure
dash 151,775,776 69,779 configure-coreutils
osh-native 789,456,989 69,779 configure-coreutils
bash 886,051,458 69,779 configure-coreutils
osh-native 31,315,555 2,029 configure-helper.sh
bash 47,119,656 2,029 configure-helper.sh
dash 4,654,611 1,733 functions
bash 28,153,410 1,733 functions
osh-native 29,521,198 1,733 functions
dash 23,598,849 9,661 ltmain.sh
osh-native 116,722,185 9,661 ltmain.sh
bash 172,845,801 9,661 ltmain.sh
dash 3,168,267 1,679 t4014-format-patch.sh
osh-native 11,898,644 1,679 t4014-format-patch.sh
bash 25,320,150 1,679 t4014-format-patch.sh
dash 4,358,947 3,123 t9300-fast-import.sh
osh-native 14,010,254 3,123 t9300-fast-import.sh
bash 41,145,971 3,123 t9300-fast-import.sh
osh-native 115,051,404 5,160 test-cmd-util.sh
bash 161,991,275 5,160 test-cmd-util.sh

Shell and Host Details

shell label shell id
bash bash-cb43b4bb
dash dash-308ec8e6
osh-cpython osh-53e619bc
osh-native osh-4c87a30b
host label host id
no-host no-host-bcfc81f0

Raw Data

filename
no-host.2024-05-05__21-12-35.cachegrind.tsv
no-host.2024-05-05__21-12-35.times.csv

raw files