| 1 | #!/usr/bin/env bash
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| 2 | #
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| 3 | # Usage:
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| 4 | # ./startup.sh <function name>
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| 5 |
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| 6 | set -o nounset
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| 7 | set -o pipefail
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| 8 | set -o errexit
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| 9 |
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| 10 | readonly TIMEFORMAT='%R'
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| 11 |
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| 12 | # 3 groups:
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| 13 | # dash/mksh/lua/awk: < 90 syscalls
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| 14 | # bash/zsh/perl: 145-289 syscalls
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| 15 | # python -S/python3 -S/ruby: 200-800 syscalls
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| 16 |
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| 17 | # This throws off absolute timing, but relative still makes sense.
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| 18 | # TODO: get rid of wc -l if not.
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| 19 |
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| 20 | # Ubuntu inside Virtualbox on Macbook Air:
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| 21 | #
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| 22 | # dash/mksh/mawk: 1 ms
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| 23 | # bash/gawk/perl: 2 ms
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| 24 | # zsh: 3 ms
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| 25 | # python -S: 5 ms
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| 26 | # python3 -S : 13 ms
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| 27 | # python import: 16 ms
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| 28 | # app.zip / hello.ovm: 10 ms
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| 29 | # oil true: 46 ms
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| 30 | # oil echo hi: 59 ms
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| 31 |
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| 32 | strace-callback() {
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| 33 | strace "$@" 2>&1 | wc -l
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| 34 | }
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| 35 |
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| 36 | time-callback() {
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| 37 | time "$@" >/dev/null
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| 38 | }
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| 39 |
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| 40 | compare() {
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| 41 | local callback=${1:-strace-callback}
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| 42 |
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| 43 | # dash is the fastest: 0 ms.
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| 44 | for sh in bash dash mksh zsh; do
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| 45 | echo $sh
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| 46 | $callback $sh -c 'echo "hi" > /dev/null'
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| 47 | echo
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| 48 | done
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| 49 |
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| 50 | # gawk is slower than mawk
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| 51 | for awk in gawk mawk; do
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| 52 | echo $awk
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| 53 | $callback $awk '{ print "hi" } ' < /dev/null
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| 54 | echo
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| 55 | done
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| 56 |
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| 57 | if which lua; then
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| 58 | echo lua
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| 59 | $callback lua -e 'print "hi"'
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| 60 | echo
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| 61 | fi
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| 62 |
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| 63 | echo perl
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| 64 | $callback perl -e 'print "hi\n"'
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| 65 | echo
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| 66 |
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| 67 | # Woah 247 ms? Ruby is slower than Python.
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| 68 | if which ruby; then
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| 69 | echo ruby
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| 70 | $callback ruby -e 'print "hi\n"'
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| 71 | echo
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| 72 | fi
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| 73 |
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| 74 | # Oh almost all stats come from -S!
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| 75 | for py in python python3; do
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| 76 | echo $py -S
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| 77 | $callback $py -S -c 'print("hi")'
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| 78 | echo
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| 79 | done
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| 80 |
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| 81 | for py in python python3; do
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| 82 | echo $py import
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| 83 | $callback $py -S -c 'import json;print("hi")'
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| 84 | echo
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| 85 | done
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| 86 |
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| 87 | for py in python python3; do
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| 88 | echo $py import
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| 89 | $callback $py -S -c 'import json;print("hi")'
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| 90 | echo
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| 91 | done
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| 92 |
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| 93 | echo 'Small app.zip'
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| 94 | $callback python -S _tmp/app.zip
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| 95 | echo
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| 96 |
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| 97 | # This is close to app.zip, a few milliseconds slower.
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| 98 | echo 'hello app bundle'
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| 99 | $callback _bin/hello.ovm || true
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| 100 | echo
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| 101 |
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| 102 | echo 'OSH app bundle true'
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| 103 | $callback _bin/true
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| 104 | echo
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| 105 |
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| 106 | echo 'OSH app bundle Hello World'
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| 107 | $callback _bin/osh -c 'echo hi'
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| 108 | echo
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| 109 | }
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| 110 |
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| 111 | compare-strace() {
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| 112 | compare strace-callback
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| 113 | }
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| 114 |
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| 115 | compare-time() {
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| 116 | compare time-callback
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| 117 | }
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| 118 |
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| 119 | import-stats() {
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| 120 | # 152 sys calls! More than bash needs to start up.
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| 121 | echo json
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| 122 | strace python -c 'import json' 2>&1 | grep json | wc -l
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| 123 |
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| 124 | echo nonexistent___
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| 125 | strace python -c 'import nonexistent___' 2>&1 | grep nonexistent___ | wc -l
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| 126 | }
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| 127 |
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| 128 | make-zip() {
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| 129 | rm -r -f _tmp/app
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| 130 | rm -f _tmp/app.zip
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| 131 |
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| 132 | mkdir -p _tmp/app
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| 133 |
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| 134 | cat > _tmp/app/lib1.py <<EOF
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| 135 | print "hi from lib1"
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| 136 | EOF
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| 137 |
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| 138 | cat > _tmp/app/lib2.py <<EOF
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| 139 | print "hi from lib2"
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| 140 | EOF
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| 141 |
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| 142 | cat > _tmp/app/__main__.py <<EOF
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| 143 | import sys
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| 144 | sys.path = [sys.argv[0]]
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| 145 | import lib1
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| 146 | import lib2
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| 147 | print "hi from zip"
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| 148 | EOF
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| 149 |
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| 150 | pushd _tmp/app
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| 151 | zip -r ../app.zip .
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| 152 | popd
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| 153 | }
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| 154 |
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| 155 | # Can get this down to 5 ms, 593 syscalls. Needs to be much less.
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| 156 | test-zip() {
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| 157 | python -S _tmp/app.zip
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| 158 | }
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| 159 |
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| 160 | # This still tries to import encodings and stuff like that.
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| 161 | strace-zip() {
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| 162 | strace python -S _tmp/app.zip
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| 163 | }
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| 164 |
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| 165 | "$@"
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