Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4834 4835 echo hi 02 122 145 156 247 262 269 4915 4916 date 03 49 71 66 143 160 154 4834 4835 date ; 04 123 146 157 283 269 305 4837 4918 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4917 4918 date; echo hi 06 123 146 157 249 266 271 4918 4918 echo hi; date 07 191 216 241 335 356 355 4991 4992 date; date 08 191 216 241 335 357 355 4992 4992 { date; date; } 09 191 216 241 335 357 355 4991 4992 date; { date; } 10 201 225 250 353 387 373 5005 5006 . _tmp/sourced.sh 11 55 78 81 173 198 182 4834 4849 (echo hi) 12 122 145 158 255 268 277 4834 4916 (date) 13 122 145 158 263 274 285 4834 4916 ( ( date ) ) 14 123 146 159 265 278 287 4834 4918 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4834 4918 echo hi; (date) 16 123 146 159 257 272 279 4834 4918 echo hi; (date;) 17 56 79 82 174 202 183 4834 4850 echo hi; (echo hi;) 18 124 147 173 258 276 301 4834 4919 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4834 4851 ( echo hi ); echo hi 20 130 151 164 250 265 272 4925 4925 date > /tmp/redir.txt 21 125 148 166 258 271 280 4834 4926 (date;) > /tmp/sentence.txt 22 209 230 276 357 371 390 5017 5016 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4843 4844 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4834 4859 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 4952 4952 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4834 4933 (date; echo hi) 27 131 154 179 266 281 308 4924 4925 echo $(date) 28 63 87 101 184 208 192 4857 4858 echo $(echo hi) 29 131 154 179 296 287 316 4834 4925 echo $( ( date ) ) 30 140 164 195 299 316 319 4834 4942 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4834 4851 ( echo hi ); echo done 32 203 226 271 354 367 387 5009 5009 date | wc -l 33 203 226 271 354 367 387 4834 5009 ! date | wc -l 34 136 159 195 280 300 300 4943 4942 echo a | wc -l 35 136 159 195 280 360 300 4943 4942 command echo a | wc -l 36 203 226 271 354 367 416 5010 5009 command date | wc -l 37 203 226 271 354 367 416 4834 5009 ! command date | wc -l 38 203 226 271 362 374 395 4834 5008 ( date ) | wc -l 39 167 219 226 315 307 334 4958 4959 date | read x 40 137 160 196 281 306 301 4943 4943 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4945 4945 { echo a; echo b; } | wc -l; echo done 42 205 228 287 387 381 419 5014 5013 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4834 4943 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4834 4942 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4834 4943 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4834 4848 echo hi & wait 47 129 151 167 274 273 297 4834 4915 date & wait 48 148 168 206 306 317 327 4834 4936 echo hi | wc -l & wait 49 212 232 282 380 383 414 4834 5003 date | wc -l & wait 50 130 152 168 310 278 333 4834 4917 trap 'echo mytrap' EXIT; date & wait 51 213 236 283 432 388 466 4834 5008 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4834 4935 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7016 8229 9451 14464 15166 15650 253869 256511