Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4891 4892 echo hi 02 122 145 156 247 262 269 4972 4973 date 03 49 71 66 143 160 154 4891 4891 date ; 04 123 146 157 283 269 305 4894 4976 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4974 4975 date; echo hi 06 123 146 157 249 266 271 4975 4975 echo hi; date 07 191 216 241 335 356 355 5048 5049 date; date 08 191 216 241 335 357 355 5050 5049 { date; date; } 09 191 216 241 335 357 355 5050 5049 date; { date; } 10 201 225 250 353 387 373 5062 5063 . _tmp/sourced.sh 11 55 78 81 173 198 182 4891 4906 (echo hi) 12 122 145 158 255 268 277 4891 4973 (date) 13 122 145 158 263 274 285 4891 4973 ( ( date ) ) 14 123 146 159 265 278 287 4890 4975 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4891 4975 echo hi; (date) 16 123 146 159 257 272 279 4891 4975 echo hi; (date;) 17 56 79 82 174 202 183 4891 4907 echo hi; (echo hi;) 18 124 147 173 258 276 301 4891 4977 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4890 4908 ( echo hi ); echo hi 20 130 151 164 250 265 272 4982 4983 date > /tmp/redir.txt 21 125 148 166 258 271 280 4891 4984 (date;) > /tmp/sentence.txt 22 209 230 276 357 370 390 5073 5074 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4899 4901 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4890 4916 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 5008 5009 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4891 4990 (date; echo hi) 27 131 154 179 266 281 308 4981 4982 echo $(date) 28 63 87 101 184 208 192 4914 4915 echo $(echo hi) 29 131 154 179 296 287 316 4891 4982 echo $( ( date ) ) 30 140 164 195 299 316 319 4890 4999 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4891 4908 ( echo hi ); echo done 32 203 226 271 354 367 387 5065 5066 date | wc -l 33 203 226 271 354 367 387 4890 5066 ! date | wc -l 34 136 159 195 280 300 300 4999 4998 echo a | wc -l 35 136 159 195 280 360 300 4999 4999 command echo a | wc -l 36 203 226 271 354 367 416 5066 5065 command date | wc -l 37 203 226 271 354 368 416 4891 5066 ! command date | wc -l 38 203 226 271 362 374 395 4891 5066 ( date ) | wc -l 39 167 219 226 315 307 334 5017 5016 date | read x 40 137 160 196 281 306 301 5000 5000 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 5001 5002 { echo a; echo b; } | wc -l; echo done 42 205 228 287 387 381 419 5068 5070 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4891 5000 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4891 4999 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4891 5001 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4890 4905 echo hi & wait 47 129 151 167 274 273 297 4891 4972 date & wait 48 149 169 206 306 317 327 4891 4994 echo hi | wc -l & wait 49 212 232 282 380 383 414 4891 5061 date | wc -l & wait 50 130 152 168 310 278 333 4891 4974 trap 'echo mytrap' EXIT; date & wait 51 216 233 283 432 388 466 4891 5065 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4891 4987 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7020 8227 9451 14464 15166 15650 256821 259476