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 3,553
bash 118,863 728
osh-native 118,863 410
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 5 5 0 3 2,698 Build.sh
osh-native 9 5 5 8 2,698 Build.sh
osh-cpython 201 180 20 20 2,698 Build.sh
dash 1 1 0 2 2,512 abuild
bash 7 4 4 3 2,512 abuild
osh-native 11 7 3 9 2,512 abuild
osh-cpython 273 268 4 21 2,512 abuild
dash 6 6 0 2 20,489 configure
bash 24 20 4 4 20,489 configure
osh-native 56 48 8 22 20,489 configure
osh-cpython 1,442 1,410 32 42 20,489 configure
dash 16 16 0 2 69,779 configure-coreutils
bash 67 63 4 3 69,779 configure-coreutils
osh-native 144 136 8 51 69,779 configure-coreutils
osh-cpython 4,428 4,398 28 87 69,779 configure-coreutils
bash 7 7 0 3 2,029 configure-helper.sh
osh-native 7 4 4 8 2,029 configure-helper.sh
osh-cpython 207 202 4 20 2,029 configure-helper.sh
dash 1 1 0 2 1,733 functions
bash 5 3 3 3 1,733 functions
osh-native 8 4 4 8 1,733 functions
osh-cpython 203 195 8 20 1,733 functions
dash 5 4 0 2 9,661 ltmain.sh
bash 17 17 0 4 9,661 ltmain.sh
osh-native 26 26 0 15 9,661 ltmain.sh
osh-cpython 667 642 24 28 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
osh-native 4 4 0 7 1,679 t4014-format-patch.sh
bash 4 4 0 3 1,679 t4014-format-patch.sh
osh-cpython 72 59 12 18 1,679 t4014-format-patch.sh
dash 1 1 0 2 3,123 t9300-fast-import.sh
osh-native 4 2 2 7 3,123 t9300-fast-import.sh
bash 6 6 0 3 3,123 t9300-fast-import.sh
osh-cpython 73 69 4 18 3,123 t9300-fast-import.sh
bash 20 20 0 3 5,160 test-cmd-util.sh
osh-native 21 14 7 12 5,160 test-cmd-util.sh
osh-cpython 580 571 8 26 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 38,345,415 2,698 Build.sh
dash 7,043,427 2,512 abuild
bash 43,752,445 2,512 abuild
osh-native 46,305,153 2,512 abuild
dash 53,264,106 20,489 configure
osh-native 263,775,122 20,489 configure
bash 349,528,134 20,489 configure
dash 151,775,776 69,779 configure-coreutils
osh-native 789,456,392 69,779 configure-coreutils
bash 886,051,458 69,779 configure-coreutils
osh-native 31,314,989 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 29,520,632 1,733 functions
dash 23,598,849 9,661 ltmain.sh
osh-native 116,721,889 9,661 ltmain.sh
bash 172,845,801 9,661 ltmain.sh
dash 3,168,267 1,679 t4014-format-patch.sh
osh-native 11,898,178 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 14,009,658 3,123 t9300-fast-import.sh
bash 41,145,971 3,123 t9300-fast-import.sh
osh-native 115,050,909 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-20c21b06
dash dash-308ec8e6
osh-cpython osh-5fe9e4a0
osh-native osh-b9208705
host label host id
no-host no-host-bcfc81f0

Raw Data

filename
no-host.2024-05-01__17-44-53.cachegrind.tsv
no-host.2024-05-01__17-44-53.times.csv

raw files