Number of Syscalls ID dash ash yash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 74 66 142 162 153 4850 4851 echo hi 02 114 136 141 141 222 235 246 4931 4917 date 03 114 136 141 156 222 235 246 4931 4917 date ; 04 123 146 158 157 283 266 305 4855 4936 trap 'echo mytrap' EXIT; date 05 123 146 154 157 249 263 271 4899 4900 date; echo hi 06 115 137 145 157 224 239 271 4899 4885 echo hi; date 07 183 207 217 241 310 329 355 5007 4993 date; date 08 183 207 217 241 335 330 355 4973 4959 { date; date; } 09 183 207 217 241 335 330 355 4973 4959 date; { date; } 10 201 225 240 250 353 384 373 4986 4987 . _tmp/sourced.sh 11 47 69 75 81 173 171 182 4850 4851 (echo hi) 12 114 136 142 158 255 241 277 4850 4917 (date) 13 114 136 143 158 263 247 285 4816 4883 ( ( date ) ) 14 123 146 156 159 265 275 287 4816 4900 ( ( date ) ); echo hi 15 115 137 146 159 257 245 279 4816 4885 echo hi; (date) 16 115 137 146 159 257 245 279 4816 4885 echo hi; (date;) 17 48 70 78 82 174 175 183 4816 4818 echo hi; (echo hi;) 18 116 138 149 173 258 249 301 4816 4886 echo hi; (echo hi; date) 19 56 79 88 82 175 199 184 4816 4833 ( echo hi ); echo hi 20 120 140 146 164 250 241 272 4906 4890 date > /tmp/redir.txt 21 117 139 161 166 258 244 280 4816 4890 (date;) > /tmp/sentence.txt 22 208 230 227 276 357 368 390 5032 5014 date 2> /tmp/stderr.txt | wc -l 23 55 75 82 73 152 169 163 4825 4826 echo hi > /tmp/redir.txt 24 50 72 85 89 176 173 185 4852 4862 (echo hi;) > /tmp/sentence.txt 25 143 165 163 202 283 299 303 4967 4949 echo hi 2> /tmp/stderr.txt | wc -l 26 123 146 155 172 279 272 300 4816 4900 (date; echo hi) 27 131 154 166 179 266 278 308 4906 4907 echo $(date) 28 63 87 99 101 184 205 192 4839 4840 echo $(echo hi) 29 131 154 167 179 296 284 316 4816 4907 echo $( ( date ) ) 30 140 164 181 195 299 313 319 4816 4924 echo $( ( date ); echo hi ) 31 56 79 88 82 175 199 184 4816 4833 ( echo hi ); echo done 32 202 226 222 271 354 364 387 4989 4971 date | wc -l 33 202 226 239 271 354 364 387 4816 4990 ! date | wc -l 34 135 159 155 195 280 297 300 4922 4904 echo a | wc -l 35 135 159 155 195 280 357 300 4922 4904 command echo a | wc -l 36 202 226 231 271 354 364 416 4989 4971 command date | wc -l 37 202 226 248 272 354 364 416 4816 4990 ! command date | wc -l 38 202 226 222 272 362 371 395 4816 4971 ( date ) | wc -l 39 166 219 213 226 315 304 334 4939 4940 date | read x 40 136 160 158 196 281 276 301 4923 4905 { echo a; echo b; } | wc -l 41 138 161 177 197 283 307 303 4961 4962 { echo a; echo b; } | wc -l; echo done 42 204 228 227 286 387 348 419 4992 4974 { echo a; date; } | wc -l 43 136 160 158 196 281 304 301 4816 4905 ( echo a; echo b ) | wc -l 44 136 160 159 196 291 311 311 4852 4941 ( echo a; echo b ) | ( wc -l ) 45 137 161 163 212 322 290 341 4850 4940 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 92 90 200 201 210 4816 4830 echo hi & wait 47 129 151 159 167 274 268 297 4850 4931 date & wait 48 149 169 182 206 306 312 327 4816 4918 echo hi | wc -l & wait 49 212 232 249 282 380 378 414 4816 4985 date | wc -l & wait 50 130 152 167 168 310 275 333 4852 4935 trap 'echo mytrap' EXIT; date & wait 51 213 233 257 283 432 386 466 4850 5021 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 176 179 341 303 362 4852 4947 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 6937 8147 8556 9527 14468 14609 15719 253578 255739