Number of Syscalls ID dash ash mksh bash-5 bash-4 zsh osh ysh Description 01 40 64 59 144 156 197 1209 1209 echo hi 02 97 122 131 231 254 277 1209 1209 date 03 42 66 59 145 157 192 1209 1209 date ; 04 98 123 132 269 292 284 1209 1209 trap 'echo mytrap' EXIT; date 05 98 123 132 233 256 281 1209 1209 date; echo hi 06 98 123 132 233 256 281 1209 1209 echo hi; date 07 139 166 189 292 313 345 1209 1209 date; date 08 139 166 189 292 313 346 1209 1209 { date; date; } 09 139 166 189 292 313 346 1209 1209 date; { date; } 10 149 175 198 310 331 376 1209 1209 . _tmp/sourced.sh 11 47 72 73 174 184 230 1209 1209 (echo hi) 12 97 122 133 239 262 283 1209 1209 (date) 13 97 122 133 247 270 289 1209 1209 ( ( date ) ) 14 98 123 134 249 272 293 1209 1209 ( ( date ) ); echo hi 15 98 123 134 241 264 287 1209 1209 echo hi; (date) 16 98 123 134 241 264 287 1209 1209 echo hi; (date;) 17 48 73 74 175 185 234 1209 1209 echo hi; (echo hi;) 18 99 124 147 242 285 291 1209 1209 echo hi; (echo hi; date) 19 48 73 74 176 186 234 1209 1209 ( echo hi ); echo hi 20 105 128 139 234 257 280 1209 1209 date > /tmp/redir.txt 21 100 125 141 242 265 286 1209 1209 (date;) > /tmp/sentence.txt 22 164 187 231 321 355 366 1209 1209 date 2> /tmp/stderr.txt | wc -l 23 48 70 66 154 166 204 1209 1209 echo hi > /tmp/redir.txt 24 50 75 81 177 187 232 1209 1209 (echo hi;) > /tmp/sentence.txt 25 116 139 174 264 285 315 1209 1209 echo hi 2> /tmp/stderr.txt | wc -l 26 105 130 146 262 284 314 1209 1209 (date; echo hi) 27 106 131 154 250 292 296 1209 1209 echo $(date) 28 55 81 93 185 194 240 1209 1209 echo $(echo hi) 29 106 131 154 279 300 302 1209 1209 echo $( ( date ) ) 30 114 140 169 282 303 331 1209 1209 echo $( ( date ); echo hi ) 31 48 73 74 176 186 234 1209 1209 ( echo hi ); echo done 32 158 183 226 318 352 363 1209 1209 date | wc -l 33 158 183 227 318 352 363 1209 1209 ! date | wc -l 34 108 133 167 261 282 313 1209 1209 echo a | wc -l 35 108 133 167 261 282 356 1209 1209 command echo a | wc -l 36 158 183 227 318 380 363 1209 1209 command date | wc -l 37 158 183 227 318 380 363 1209 1209 ! command date | wc -l 38 158 183 226 326 360 370 1209 1209 ( date ) | wc -l 39 141 195 200 298 318 322 1209 1209 date | read x 40 109 134 168 262 283 319 1209 1209 { echo a; echo b; } | wc -l 41 110 135 169 264 285 323 1209 1209 { echo a; echo b; } | wc -l; echo done 42 160 185 241 350 383 377 1209 1209 { echo a; date; } | wc -l 43 109 134 168 262 283 320 1209 1209 ( echo a; echo b ) | wc -l 44 109 134 168 272 293 327 1209 1209 ( echo a; echo b ) | ( wc -l ) 45 110 135 183 302 322 338 1209 1209 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 54 78 82 201 210 238 1209 1209 echo hi & wait 47 104 128 142 258 280 288 1209 1209 date & wait 48 117 139 178 287 307 330 1209 1209 echo hi | wc -l & wait 49 167 193 238 344 377 379 1209 1209 date | wc -l & wait 50 105 129 143 296 318 293 1209 1209 trap 'echo mytrap' EXIT; date & wait 51 168 194 238 398 431 384 1209 1209 trap 'echo mytrap' EXIT; date | wc -l & wait 52 112 136 153 326 346 323 1209 1209 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 5567 6889 8006 13491 14711 15805 62868 62868