Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4825 4826 echo hi 02 122 145 156 247 262 269 4906 4907 date 03 49 71 66 143 160 154 4825 4826 date ; 04 123 146 157 283 269 305 4828 4909 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4908 4909 date; echo hi 06 123 146 157 249 266 271 4908 4909 echo hi; date 07 191 216 241 335 356 355 4982 4983 date; date 08 191 216 241 335 357 355 4982 4983 { date; date; } 09 191 216 241 335 357 355 4982 4983 date; { date; } 10 201 225 250 353 387 373 4995 4996 . _tmp/sourced.sh 11 55 78 81 173 198 182 4825 4840 (echo hi) 12 122 145 158 255 268 277 4825 4907 (date) 13 122 145 158 263 274 285 4825 4907 ( ( date ) ) 14 123 146 159 265 278 287 4825 4909 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4825 4909 echo hi; (date) 16 123 146 159 257 272 279 4825 4909 echo hi; (date;) 17 56 79 82 174 202 183 4825 4841 echo hi; (echo hi;) 18 124 147 173 258 276 301 4825 4910 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4825 4842 ( echo hi ); echo hi 20 130 151 164 250 265 272 4915 4916 date > /tmp/redir.txt 21 125 148 166 258 271 280 4825 4916 (date;) > /tmp/sentence.txt 22 209 230 276 357 370 390 5005 5006 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4834 4835 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4825 4849 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 4940 4941 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4825 4923 (date; echo hi) 27 131 154 179 266 281 308 4915 4916 echo $(date) 28 63 87 101 184 208 192 4848 4849 echo $(echo hi) 29 131 154 179 296 287 316 4825 4916 echo $( ( date ) ) 30 140 164 195 299 316 319 4825 4933 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4825 4842 ( echo hi ); echo done 32 203 226 271 354 367 387 4998 4999 date | wc -l 33 203 226 271 354 367 387 4825 4999 ! date | wc -l 34 136 159 195 280 300 300 4931 4932 echo a | wc -l 35 136 159 195 280 360 300 4931 4932 command echo a | wc -l 36 203 226 271 354 367 416 4998 4999 command date | wc -l 37 203 226 271 354 367 416 4825 4999 ! command date | wc -l 38 203 226 271 362 374 395 4825 4999 ( date ) | wc -l 39 167 219 226 315 307 334 4948 4949 date | read x 40 137 160 196 281 306 301 4932 4933 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4934 4935 { echo a; echo b; } | wc -l; echo done 42 205 228 287 387 381 419 5000 5002 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4825 4933 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4825 4933 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4825 4934 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4825 4839 echo hi & wait 47 129 151 167 274 273 297 4825 4906 date & wait 48 145 169 206 306 317 327 4825 4927 echo hi | wc -l & wait 49 215 232 282 380 383 414 4825 4994 date | wc -l & wait 50 130 152 168 310 278 333 4825 4908 trap 'echo mytrap' EXIT; date & wait 51 213 233 283 432 388 466 4825 4996 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4825 4920 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7016 8227 9451 14464 15165 15650 253370 256015