Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4848 4849 echo hi 02 122 145 156 247 262 269 4929 4930 date 03 49 71 66 143 160 154 4848 4849 date ; 04 123 146 157 283 269 305 4851 4932 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4931 4932 date; echo hi 06 123 146 157 249 266 271 4932 4932 echo hi; date 07 191 216 241 335 356 355 5005 5006 date; date 08 191 216 241 335 357 355 5010 5006 { date; date; } 09 191 216 241 335 357 355 5010 5006 date; { date; } 10 201 225 250 353 387 373 5019 5020 . _tmp/sourced.sh 11 55 78 81 173 198 182 4848 4863 (echo hi) 12 122 145 158 255 268 277 4848 4930 (date) 13 122 145 158 263 274 285 4848 4930 ( ( date ) ) 14 123 146 159 265 278 287 4848 4932 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4848 4932 echo hi; (date) 16 123 146 159 257 272 279 4848 4932 echo hi; (date;) 17 56 79 82 174 202 183 4848 4864 echo hi; (echo hi;) 18 124 147 173 258 276 301 4848 4933 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4848 4865 ( echo hi ); echo hi 20 130 151 164 250 265 272 4939 4940 date > /tmp/redir.txt 21 125 148 166 258 271 280 4848 4940 (date;) > /tmp/sentence.txt 22 209 230 277 357 371 390 5033 5030 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4857 4858 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4848 4873 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 4965 4966 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4848 4947 (date; echo hi) 27 131 154 179 266 281 308 4938 4939 echo $(date) 28 63 87 101 184 208 192 4871 4872 echo $(echo hi) 29 131 154 179 296 287 316 4848 4939 echo $( ( date ) ) 30 140 164 195 299 316 319 4848 4956 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4848 4865 ( echo hi ); echo done 32 203 226 271 354 368 387 5023 5023 date | wc -l 33 203 226 271 354 368 387 4848 5023 ! date | wc -l 34 136 159 195 280 300 300 4956 4956 echo a | wc -l 35 136 159 195 280 360 300 4956 4956 command echo a | wc -l 36 203 226 272 354 367 416 5024 5023 command date | wc -l 37 203 226 272 354 367 416 4848 5023 ! command date | wc -l 38 203 226 271 362 374 395 4848 5023 ( date ) | wc -l 39 167 219 226 315 307 334 4972 4973 date | read x 40 137 160 196 281 306 301 4957 4957 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4959 4959 { echo a; echo b; } | wc -l; echo done 42 205 228 286 387 381 419 5026 5027 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4848 4957 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4848 4956 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4848 4957 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4848 4862 echo hi & wait 47 129 151 167 274 273 297 4848 4929 date & wait 48 148 165 206 306 317 327 4848 4950 echo hi | wc -l & wait 49 212 232 282 380 383 414 4848 5017 date | wc -l & wait 50 130 152 168 310 278 333 4848 4931 trap 'echo mytrap' EXIT; date & wait 51 213 236 283 432 389 466 4848 5022 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4848 4944 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7016 8226 9453 14464 15169 15650 254603 257236