Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh osh Description 01 47 69 66 156 184 168 4888 4889 echo hi 02 130 153 164 269 289 292 4976 4977 date 03 49 71 66 157 179 169 4888 4889 date ; 04 131 154 165 305 296 328 4978 4979 trap 'echo mytrap' EXIT; date 05 131 154 165 271 293 294 4978 4979 date; echo hi 06 131 154 165 271 293 294 4978 4979 echo hi; date 07 199 224 249 357 383 378 5052 5053 date; date 08 199 224 249 357 384 378 5052 5053 { date; date; } 09 199 224 249 357 384 378 5052 5053 date; { date; } 10 209 233 258 375 414 396 5064 5065 . _tmp/sourced.sh 11 55 78 81 187 217 197 4902 4903 (echo hi) 12 130 153 166 277 295 300 4976 4977 (date) 13 130 153 166 285 301 308 4976 4977 ( ( date ) ) 14 131 154 167 287 305 310 4978 4979 ( ( date ) ); echo hi 15 131 154 167 279 299 302 4978 4979 echo hi; (date) 16 131 154 167 279 299 302 4978 4979 echo hi; (date;) 17 56 79 82 188 221 198 4903 4904 echo hi; (echo hi;) 18 132 155 181 280 303 324 4979 4980 echo hi; (echo hi; date) 19 56 79 82 189 221 199 4904 4905 ( echo hi ); echo hi 20 138 159 172 272 292 295 4985 4986 date > /tmp/redir.txt 21 133 156 174 280 298 303 4985 4986 (date;) > /tmp/sentence.txt 22 225 246 292 387 405 421 5082 5083 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 166 191 178 4897 4898 echo hi > /tmp/redir.txt 24 58 81 89 190 219 200 4911 4912 (echo hi;) > /tmp/sentence.txt 25 152 173 210 305 329 326 5010 5011 echo hi 2> /tmp/stderr.txt | wc -l 26 139 162 180 301 326 323 4992 4993 (date; echo hi) 27 139 162 187 288 308 331 4985 4986 echo $(date) 28 63 87 101 198 227 207 4911 4912 echo $(echo hi) 29 139 162 187 318 314 339 4985 4986 echo $( ( date ) ) 30 148 172 203 321 343 342 5002 5003 echo $( ( date ); echo hi ) 31 56 79 82 189 221 199 4904 4905 ( echo hi ); echo done 32 219 242 287 384 402 418 5075 5076 date | wc -l 33 219 242 287 384 402 418 4888 5076 ! date | wc -l 34 144 167 203 302 327 323 5001 5002 echo a | wc -l 35 144 167 203 302 395 323 5001 5003 command echo a | wc -l 36 219 242 287 384 402 447 5075 5076 command date | wc -l 37 219 242 287 384 402 447 4888 5076 ! command date | wc -l 38 219 242 287 392 409 426 5075 5076 ( date ) | wc -l 39 175 227 234 337 334 357 5018 5019 date | read x 40 145 168 204 303 333 324 5002 5003 { echo a; echo b; } | wc -l 41 146 169 205 305 337 326 5004 5005 { echo a; echo b; } | wc -l; echo done 42 221 244 302 417 416 450 5078 5079 { echo a; date; } | wc -l 43 145 168 204 303 334 324 5002 5004 ( echo a; echo b ) | wc -l 44 145 168 204 313 341 334 5002 5003 ( echo a; echo b ) | ( wc -l ) 45 146 169 220 344 352 364 5003 5004 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 214 225 223 4901 4902 echo hi & wait 47 137 159 175 296 300 318 4975 4976 date & wait 48 153 173 214 328 344 348 4996 4997 echo hi | wc -l & wait 49 228 248 298 410 418 443 5070 5071 date | wc -l & wait 50 138 160 176 332 305 354 4977 4978 trap 'echo mytrap' EXIT; date & wait 51 233 249 300 462 423 495 5072 5073 trap 'echo mytrap' EXIT; date | wc -l & wait 52 146 168 187 363 335 383 4989 4990 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7425 8631 9859 15600 16569 16824 259221 259649