Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4858 4859 echo hi 02 122 145 156 247 262 269 4939 4940 date 03 49 71 66 143 160 154 4858 4859 date ; 04 123 146 157 283 269 305 4861 4942 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4941 4942 date; echo hi 06 123 146 157 249 266 271 4941 4942 echo hi; date 07 191 216 241 335 356 355 5015 5016 date; date 08 191 216 241 335 357 355 5015 5016 { date; date; } 09 191 216 241 335 357 355 5015 5016 date; { date; } 10 201 225 250 353 387 373 5031 5030 . _tmp/sourced.sh 11 55 78 81 173 198 182 4858 4873 (echo hi) 12 122 145 158 255 268 277 4858 4940 (date) 13 122 145 158 263 274 285 4858 4940 ( ( date ) ) 14 123 146 159 265 278 287 4858 4942 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4858 4942 echo hi; (date) 16 123 146 159 257 272 279 4858 4942 echo hi; (date;) 17 56 79 82 174 202 183 4858 4874 echo hi; (echo hi;) 18 124 147 173 258 276 301 4858 4943 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4858 4875 ( echo hi ); echo hi 20 130 151 164 250 265 272 4948 4949 date > /tmp/redir.txt 21 125 148 166 258 271 280 4858 4949 (date;) > /tmp/sentence.txt 22 209 230 276 357 371 390 5040 5039 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4867 4868 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4858 4883 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 4975 4974 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4858 4956 (date; echo hi) 27 131 154 179 266 281 308 4948 4949 echo $(date) 28 63 87 101 184 208 192 4881 4882 echo $(echo hi) 29 131 154 179 296 287 316 4858 4949 echo $( ( date ) ) 30 140 164 195 299 316 319 4858 4966 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4858 4875 ( echo hi ); echo done 32 203 226 271 354 367 387 5032 5032 date | wc -l 33 203 226 271 354 368 387 4858 5033 ! date | wc -l 34 136 159 195 280 300 300 4965 4965 echo a | wc -l 35 136 159 195 280 360 300 4966 4965 command echo a | wc -l 36 203 226 271 354 367 416 5033 5032 command date | wc -l 37 203 226 271 354 367 416 4858 5033 ! command date | wc -l 38 203 226 271 362 374 395 4858 5032 ( date ) | wc -l 39 167 219 226 315 307 334 4982 4983 date | read x 40 137 160 196 281 306 301 4966 4966 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4968 4969 { echo a; echo b; } | wc -l; echo done 42 205 228 287 387 381 419 5036 5035 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4858 4966 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4858 4966 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4858 4967 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4858 4872 echo hi & wait 47 129 151 167 274 273 297 4858 4939 date & wait 48 149 169 206 306 317 327 4858 4960 echo hi | wc -l & wait 49 212 232 282 380 383 414 4858 5027 date | wc -l & wait 50 130 152 168 310 278 333 4858 4941 trap 'echo mytrap' EXIT; date & wait 51 213 236 283 432 388 466 4858 5032 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4858 4955 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7017 8230 9451 14464 15167 15650 255105 257742