| 1 | #!/usr/bin/env bash
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| 2 | #
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| 3 | # Test how long it takes to read many files
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| 4 |
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| 5 | big-stream() {
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| 6 | cat */*.py
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| 7 | # Python messes up here!
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| 8 | #*/*/*.py
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| 9 | }
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| 10 |
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| 11 | slow-stream() {
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| 12 | ### for testing signal handling in loop
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| 13 | local secs=${1:-1}
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| 14 |
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| 15 | while read -r line; do
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| 16 | sleep $secs
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| 17 | echo $line
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| 18 | done
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| 19 | }
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| 20 |
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| 21 | OSH=_bin/cxx-opt/osh
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| 22 | YSH=_bin/cxx-opt/ysh
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| 23 |
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| 24 | setup() {
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| 25 | local n=${1:-1} # how many copies
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| 26 |
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| 27 | for i in $(seq $n); do
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| 28 | big-stream
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| 29 | done > $BIG_FILE
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| 30 |
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| 31 | wc -l $BIG_FILE
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| 32 |
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| 33 | ninja $OSH $YSH
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| 34 | }
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| 35 |
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| 36 | py3-count() {
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| 37 | echo '=== python3'
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| 38 |
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| 39 | # Buffered I/O is much faster
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| 40 | python3 -c '
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| 41 | import sys
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| 42 | i = 0
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| 43 | for line in sys.stdin:
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| 44 | i += 1
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| 45 | print(i)
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| 46 | '
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| 47 | }
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| 48 |
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| 49 | awk-count() {
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| 50 | echo '=== awk'
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| 51 | awk '{ i += 1 } END { print i } '
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| 52 | }
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| 53 |
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| 54 | exec-ysh-count() {
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| 55 | local do_trap=${1:-}
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| 56 |
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| 57 | echo '=== ysh'
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| 58 |
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| 59 | local code='
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| 60 | var i = 0
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| 61 | for _ in <> {
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| 62 | setvar i += 1
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| 63 | }
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| 64 | echo $i
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| 65 | '
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| 66 |
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| 67 | if test -n "$do_trap"; then
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| 68 | # Register BEFORE creating pipeline
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| 69 | #trap usr1-handler USR1
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| 70 | code="
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| 71 | trap 'echo \[pid \$\$\] usr1' USR1
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| 72 | trap 'echo \[pid \$\$\] exit with status \$?' EXIT
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| 73 | echo \"hi from YSH pid \$\$\"
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| 74 |
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| 75 | $code
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| 76 | "
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| 77 | fi
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| 78 |
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| 79 | # New buffered read!
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| 80 | exec $YSH -c "$code"
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| 81 | }
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| 82 |
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| 83 | usr1-handler() {
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| 84 | echo "pid $$ got usr1"
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| 85 | }
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| 86 |
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| 87 | exec-sh-count() {
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| 88 | local sh=$1
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| 89 | local do_trap=${2:-}
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| 90 |
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| 91 | echo "shell pid = $$"
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| 92 |
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| 93 | echo === $sh
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| 94 |
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| 95 | local code='
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| 96 | i=0
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| 97 | while read -r line; do
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| 98 | i=$(( i + 1 ))
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| 99 | done
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| 100 | echo $i
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| 101 | '
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| 102 |
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| 103 | if test -n "$do_trap"; then
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| 104 | # Register BEFORE creating pipeline
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| 105 | #trap usr1-handler USR1
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| 106 | code="
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| 107 | trap 'echo \[pid \$\$\] usr1' USR1
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| 108 | trap 'echo \[pid \$\$\] exit with status \$?' EXIT
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| 109 | echo \"hi from $sh pid \$\$\"
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| 110 |
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| 111 | $code
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| 112 | "
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| 113 | fi
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| 114 | #echo "$code"
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| 115 |
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| 116 | # need exec here for trap-demo
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| 117 | exec $sh -c "$code"
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| 118 | }
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| 119 |
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| 120 | readonly BIG_FILE=_tmp/lines.txt
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| 121 |
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| 122 | compare() {
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| 123 | echo '=== wc'
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| 124 | time wc -l < $BIG_FILE # warmup
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| 125 | echo
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| 126 |
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| 127 | time py3-count < $BIG_FILE
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| 128 | echo
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| 129 |
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| 130 | time awk-count < $BIG_FILE
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| 131 | echo
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| 132 |
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| 133 | time $0 exec-ysh-count < $BIG_FILE
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| 134 | echo
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| 135 |
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| 136 | for sh in dash bash $OSH; do
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| 137 | # need $0 because it exec
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| 138 | time $0 exec-sh-count $sh < $BIG_FILE
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| 139 | echo
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| 140 | done
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| 141 | }
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| 142 |
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| 143 | sh-count-slow-trap() {
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| 144 | local write_delay=${1:-0.20}
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| 145 | local kill_delay=${2:-0.07}
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| 146 | local -a argv=( ${@:2} )
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| 147 |
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| 148 | local len=${#argv[@]}
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| 149 | #echo "len=$len"
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| 150 | if test $len -eq 0; then
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| 151 | echo 'argv required'
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| 152 | fi
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| 153 |
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| 154 | local sh=$1
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| 155 |
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| 156 | #exec-sh-count bash T & < <(seq 100 | slow-stream)
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| 157 |
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| 158 | echo "[pid $$] Spawn stream with write delay $write_delay"
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| 159 |
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| 160 | seq 10 | slow-stream $write_delay | "${argv[@]}" &
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| 161 | local pid=$!
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| 162 |
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| 163 | echo "pid of background job = $pid"
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| 164 | echo 'pstree:'
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| 165 | pstree -p $pid
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| 166 | echo
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| 167 |
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| 168 | echo "[pid $$] Entering kill loop ($kill_delay secs)"
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| 169 |
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| 170 | while true; do
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| 171 | # wait for USR1 to be registered
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| 172 | sleep $kill_delay
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| 173 |
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| 174 | kill -s USR1 $pid
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| 175 | local status=$?
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| 176 |
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| 177 | echo "[pid $$] kill $pid status: $status"
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| 178 | if test $status -ne 0; then
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| 179 | break
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| 180 | fi
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| 181 |
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| 182 | done
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| 183 |
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| 184 | time wait
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| 185 | echo "wait status: $?"
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| 186 | }
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| 187 |
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| 188 | compare-trap() {
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| 189 | # dash exits at the first try
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| 190 | #sh-count-slow-trap dash
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| 191 |
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| 192 | # Oh interesting, mksh waits until the main loop! Different behavior
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| 193 | #sh-count-slow-trap mksh
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| 194 |
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| 195 | #sh-count-slow-trap zsh
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| 196 |
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| 197 | #sh-count-slow-trap bash
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| 198 |
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| 199 | # OSH behaves like bash/zsh, yay
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| 200 | sh-count-slow-trap '' '' exec-sh-count _bin/cxx-opt/osh T
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| 201 |
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| 202 | #sh-count-slow-trap '' '' exec-ysh-count T
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| 203 |
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| 204 | return
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| 205 |
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| 206 | for sh in $YSH dash bash $OSH; do
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| 207 | sh-count-with-trap $sh
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| 208 | echo
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| 209 | echo
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| 210 | done
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| 211 | }
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| 212 |
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| 213 | "$@"
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| 214 |
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