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 4854 4935 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 4851 4935 ( ( 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 4851 4936 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4851 4868 ( echo hi ); echo hi 20 130 151 164 250 265 272 4941 4942 date > /tmp/redir.txt 21 125 148 166 258 271 280 4851 4942 (date;) > /tmp/sentence.txt 22 209 230 277 357 371 390 5031 5032 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4860 4861 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4851 4875 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 4966 4967 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 4851 4959 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4851 4868 ( 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 4957 4958 command echo a | wc -l 36 203 226 271 354 367 416 5024 5025 command date | wc -l 37 203 226 271 354 367 416 4851 5025 ! command date | wc -l 38 203 226 271 362 374 395 4865 5039 ( date ) | wc -l 39 167 219 226 315 307 334 4988 4989 date | read x 40 137 160 196 281 306 301 4958 4959 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4960 4961 { echo a; echo b; } | wc -l; echo done 42 205 228 287 387 381 419 5027 5028 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4851 4959 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4851 4959 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4851 4960 { 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 48 148 169 206 306 317 327 4851 4953 echo hi | wc -l & wait 49 212 232 282 380 383 414 4865 5034 date | wc -l & wait 50 130 152 168 310 278 333 4851 4934 trap 'echo mytrap' EXIT; date & wait 51 213 233 283 432 389 466 4851 5022 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4851 4946 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7016 8227 9452 14464 15167 15650 255101 257745