Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4887 4888 echo hi 02 122 145 156 247 262 269 4968 4969 date 03 49 71 66 143 160 154 4887 4888 date ; 04 123 146 157 283 269 305 4890 4972 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4970 4971 date; echo hi 06 123 146 157 249 266 271 4970 4971 echo hi; date 07 191 216 241 335 356 355 5044 5045 date; date 08 191 216 241 335 357 355 5045 5045 { date; date; } 09 191 216 241 335 357 355 5045 5045 date; { date; } 10 201 225 250 353 387 373 5058 5058 . _tmp/sourced.sh 11 55 78 81 173 198 182 4887 4901 (echo hi) 12 122 145 158 255 268 277 4887 4968 (date) 13 122 145 158 263 274 285 4886 4969 ( ( date ) ) 14 123 146 159 265 278 287 4887 4971 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4887 4970 echo hi; (date) 16 123 146 159 257 272 279 4887 4970 echo hi; (date;) 17 56 79 82 174 202 183 4887 4903 echo hi; (echo hi;) 18 124 147 173 258 276 301 4887 4973 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4887 4904 ( echo hi ); echo hi 20 130 151 164 250 265 272 4978 4978 date > /tmp/redir.txt 21 125 148 166 258 271 280 4887 4979 (date;) > /tmp/sentence.txt 22 209 230 276 357 370 390 5069 5070 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4896 4897 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4887 4912 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 5004 5005 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4887 4986 (date; echo hi) 27 131 154 179 266 281 308 4976 4978 echo $(date) 28 63 87 101 184 208 192 4910 4911 echo $(echo hi) 29 131 154 179 296 287 316 4887 4979 echo $( ( date ) ) 30 140 164 195 299 316 319 4887 4995 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4887 4904 ( echo hi ); echo done 32 203 226 272 354 367 387 5061 5062 date | wc -l 33 203 226 271 354 367 387 4887 5063 ! date | wc -l 34 136 159 195 280 300 300 4994 4995 echo a | wc -l 35 136 159 195 280 360 300 4995 4995 command echo a | wc -l 36 203 226 271 354 367 416 5061 5062 command date | wc -l 37 203 226 271 354 367 416 4887 5063 ! command date | wc -l 38 203 226 271 362 374 395 4887 5062 ( date ) | wc -l 39 167 219 226 315 307 334 5011 5012 date | read x 40 137 160 196 281 306 301 4997 4996 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4998 4998 { echo a; echo b; } | wc -l; echo done 42 205 228 286 387 381 419 5064 5065 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4887 4996 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4887 4995 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4887 4995 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4886 4901 echo hi & wait 47 129 151 167 274 273 297 4887 4968 date & wait 48 145 169 206 306 317 327 4887 4989 echo hi | wc -l & wait 49 212 232 282 380 383 414 4887 5056 date | wc -l & wait 50 130 152 168 310 278 333 4887 4970 trap 'echo mytrap' EXIT; date & wait 51 213 233 283 432 388 466 4887 5061 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4886 4983 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7013 8227 9451 14464 15165 15650 256611 259262