Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4875 4876 echo hi 02 122 145 156 247 262 269 4956 4957 date 03 49 71 66 143 160 154 4875 4876 date ; 04 123 146 157 283 269 305 4864 4945 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4958 4959 date; echo hi 06 123 146 157 249 266 271 4958 4959 echo hi; date 07 191 216 241 335 356 355 5032 5033 date; date 08 191 216 241 335 357 355 5032 5033 { date; date; } 09 191 216 241 335 357 355 5032 5033 date; { date; } 10 201 225 250 353 387 373 5045 5046 . _tmp/sourced.sh 11 55 78 81 173 198 182 4875 4890 (echo hi) 12 122 145 158 255 268 277 4875 4957 (date) 13 122 145 158 263 274 285 4875 4957 ( ( date ) ) 14 123 146 159 265 278 287 4861 4945 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4875 4959 echo hi; (date) 16 123 146 159 257 272 279 4875 4959 echo hi; (date;) 17 56 79 82 174 202 183 4875 4891 echo hi; (echo hi;) 18 124 147 173 258 276 301 4861 4946 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4861 4878 ( echo hi ); echo hi 20 130 151 164 250 265 272 4951 4952 date > /tmp/redir.txt 21 125 148 166 258 271 280 4861 4952 (date;) > /tmp/sentence.txt 22 209 230 276 357 371 390 5041 5042 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4870 4871 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4861 4885 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 4976 4977 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4875 4973 (date; echo hi) 27 131 154 179 266 281 308 4965 4966 echo $(date) 28 63 87 101 184 208 192 4898 4899 echo $(echo hi) 29 131 154 179 296 287 316 4875 4966 echo $( ( date ) ) 30 140 164 195 299 316 319 4861 4969 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4861 4878 ( echo hi ); echo done 32 203 226 271 354 367 387 5048 5049 date | wc -l 33 203 226 271 354 367 387 4875 5049 ! date | wc -l 34 136 159 195 280 300 300 4981 4982 echo a | wc -l 35 137 159 195 280 360 300 4967 4968 command echo a | wc -l 36 203 226 271 354 367 416 5034 5035 command date | wc -l 37 203 226 271 354 368 416 4861 5035 ! command date | wc -l 38 203 226 271 362 374 395 4875 5049 ( date ) | wc -l 39 167 219 226 315 307 334 4998 4999 date | read x 40 137 160 196 281 306 301 4968 4969 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4970 4971 { echo a; echo b; } | wc -l; echo done 42 205 228 286 387 381 419 5037 5038 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4861 4969 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4861 4969 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4861 4970 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4875 4889 echo hi & wait 47 129 151 167 274 273 297 4875 4956 date & wait 48 149 169 206 306 317 327 4861 4963 echo hi | wc -l & wait 49 216 232 282 380 383 414 4875 5044 date | wc -l & wait 50 130 152 168 310 278 333 4861 4944 trap 'echo mytrap' EXIT; date & wait 51 213 233 283 432 388 466 4861 5032 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4861 4956 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7022 8227 9450 14464 15167 15650 255621 258265