Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4865 4866 echo hi 02 122 145 156 247 262 269 4946 4947 date 03 49 71 66 143 160 154 4865 4866 date ; 04 123 146 157 283 269 305 4868 4949 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4948 4949 date; echo hi 06 123 146 157 249 266 271 4948 4949 echo hi; date 07 191 216 241 335 356 355 5022 5023 date; date 08 191 216 241 335 357 355 5022 5023 { date; date; } 09 191 216 241 335 357 355 5022 5023 date; { date; } 10 201 225 250 353 387 373 5035 5036 . _tmp/sourced.sh 11 55 78 81 173 198 182 4865 4880 (echo hi) 12 122 145 158 255 268 277 4865 4947 (date) 13 122 145 158 263 274 285 4865 4947 ( ( date ) ) 14 123 146 159 265 278 287 4865 4949 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4865 4949 echo hi; (date) 16 123 146 159 257 272 279 4865 4949 echo hi; (date;) 17 56 79 82 174 202 183 4865 4881 echo hi; (echo hi;) 18 124 147 173 258 276 301 4865 4950 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4865 4882 ( echo hi ); echo hi 20 130 151 164 250 265 272 4955 4956 date > /tmp/redir.txt 21 125 148 166 258 271 280 4865 4956 (date;) > /tmp/sentence.txt 22 209 230 276 357 371 390 5045 5046 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4874 4875 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4865 4889 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 4980 4981 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4865 4963 (date; echo hi) 27 131 154 179 266 281 308 4955 4956 echo $(date) 28 63 87 101 184 208 192 4888 4889 echo $(echo hi) 29 131 154 179 296 287 316 4865 4956 echo $( ( date ) ) 30 140 164 195 299 316 319 4865 4973 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4865 4882 ( echo hi ); echo done 32 203 226 271 354 367 387 5038 5039 date | wc -l 33 203 226 271 354 367 387 4865 5039 ! date | wc -l 34 136 159 195 280 300 300 4971 4972 echo a | wc -l 35 136 159 195 280 360 300 4971 4972 command echo a | wc -l 36 203 226 271 354 367 416 5038 5039 command date | wc -l 37 203 226 271 354 367 416 4865 5039 ! command date | wc -l 38 203 226 271 362 373 395 4865 5039 ( date ) | wc -l 39 167 219 226 315 307 334 4988 4989 date | read x 40 137 160 196 281 306 301 4972 4973 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4974 4975 { echo a; echo b; } | wc -l; echo done 42 205 228 286 387 380 419 5041 5042 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4865 4973 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4865 4973 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4865 4974 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4865 4879 echo hi & wait 47 129 151 167 274 273 297 4865 4946 date & wait 48 149 169 206 306 317 327 4865 4967 echo hi | wc -l & wait 49 216 232 282 380 383 414 4865 5034 date | wc -l & wait 50 130 152 168 310 278 333 4865 4948 trap 'echo mytrap' EXIT; date & wait 51 213 233 283 432 388 466 4865 5036 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4865 4960 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7021 8227 9450 14464 15164 15650 255451 258095