Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4850 4851 echo hi 02 122 145 156 247 262 269 4931 4932 date 03 49 71 66 143 160 154 4850 4851 date ; 04 123 146 157 283 269 305 4855 4936 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4933 4934 date; echo hi 06 123 146 157 249 266 271 4933 4934 echo hi; date 07 191 216 241 335 356 355 5007 5008 date; date 08 191 216 241 335 357 355 5007 5008 { date; date; } 09 191 216 241 335 357 355 5007 5008 date; { date; } 10 201 225 250 353 387 373 5020 5021 . _tmp/sourced.sh 11 55 78 81 173 198 182 4850 4865 (echo hi) 12 122 145 158 255 268 277 4850 4932 (date) 13 122 145 158 263 274 285 4850 4932 ( ( date ) ) 14 123 146 159 265 278 287 4852 4936 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4850 4934 echo hi; (date) 16 123 146 159 257 272 279 4850 4934 echo hi; (date;) 17 56 79 82 174 202 183 4850 4866 echo hi; (echo hi;) 18 124 147 173 258 276 301 4852 4937 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4852 4869 ( echo hi ); echo hi 20 130 151 164 250 265 272 4942 4943 date > /tmp/redir.txt 21 125 148 166 258 271 280 4852 4943 (date;) > /tmp/sentence.txt 22 209 230 276 357 370 390 5032 5033 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4861 4862 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4852 4876 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 4967 4968 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4850 4948 (date; echo hi) 27 131 154 179 266 281 308 4940 4941 echo $(date) 28 63 87 101 184 208 192 4873 4874 echo $(echo hi) 29 131 154 179 296 287 316 4850 4941 echo $( ( date ) ) 30 140 164 195 299 316 319 4852 4960 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4852 4869 ( echo hi ); echo done 32 203 226 271 354 368 387 5023 5024 date | wc -l 33 203 226 271 354 367 387 4850 5024 ! date | wc -l 34 137 159 195 280 300 300 4956 4957 echo a | wc -l 35 136 159 195 280 360 300 4958 4959 command echo a | wc -l 36 203 226 272 354 367 416 5025 5026 command date | wc -l 37 203 226 271 354 367 416 4852 5026 ! command date | wc -l 38 203 226 271 362 374 395 4850 5024 ( date ) | wc -l 39 167 219 226 315 307 334 4973 4974 date | read x 40 137 160 196 281 306 301 4959 4960 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4961 4962 { echo a; echo b; } | wc -l; echo done 42 205 228 287 387 381 419 5028 5028 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4852 4960 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4852 4960 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4852 4961 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4850 4864 echo hi & wait 47 129 151 167 274 273 297 4850 4931 date & wait 48 148 169 206 306 317 327 4852 4954 echo hi | wc -l & wait 49 213 232 282 380 384 414 4850 5019 date | wc -l & wait 50 130 152 168 310 278 333 4852 4935 trap 'echo mytrap' EXIT; date & wait 51 213 233 283 432 388 466 4852 5023 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4852 4947 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7018 8227 9452 14464 15167 15650 254721 257364