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 4821 4821 echo hi 02 114 136 141 141 222 235 246 4901 4887 date 03 114 136 141 156 222 235 246 4901 4887 date ; 04 123 146 158 157 283 266 305 4823 4904 trap 'echo mytrap' EXIT; date 05 123 146 154 157 249 263 271 4911 4912 date; echo hi 06 115 137 145 157 224 239 271 4911 4897 echo hi; date 07 183 207 217 241 310 329 355 4977 4963 date; date 08 183 207 217 241 335 330 355 4985 4972 { date; date; } 09 183 207 217 241 335 330 355 4985 4971 date; { date; } 10 201 225 240 250 353 384 373 4999 4999 . _tmp/sourced.sh 11 47 69 75 81 173 171 182 4820 4821 (echo hi) 12 114 136 142 158 255 241 277 4820 4887 (date) 13 114 136 143 158 263 247 285 4828 4895 ( ( date ) ) 14 123 146 156 159 265 275 287 4829 4912 ( ( date ) ); echo hi 15 115 137 146 159 257 245 279 4828 4897 echo hi; (date) 16 115 137 146 159 257 245 279 4828 4897 echo hi; (date;) 17 48 70 78 82 174 175 183 4828 4830 echo hi; (echo hi;) 18 116 138 149 173 258 249 301 4828 4898 echo hi; (echo hi; date) 19 56 79 88 82 175 199 184 4828 4845 ( echo hi ); echo hi 20 120 140 146 164 250 241 272 4919 4902 date > /tmp/redir.txt 21 117 139 161 166 258 244 280 4828 4902 (date;) > /tmp/sentence.txt 22 208 230 227 276 357 368 390 5000 4982 date 2> /tmp/stderr.txt | wc -l 23 55 75 82 73 152 169 163 4837 4838 echo hi > /tmp/redir.txt 24 50 72 85 89 176 173 185 4820 4830 (echo hi;) > /tmp/sentence.txt 25 143 165 163 202 283 299 303 4935 4917 echo hi 2> /tmp/stderr.txt | wc -l 26 123 146 155 172 279 272 300 4829 4912 (date; echo hi) 27 131 154 166 179 266 278 308 4918 4919 echo $(date) 28 63 87 99 101 184 205 192 4851 4852 echo $(echo hi) 29 131 154 167 179 296 284 316 4828 4920 echo $( ( date ) ) 30 140 164 181 195 299 313 319 4828 4936 echo $( ( date ); echo hi ) 31 56 79 88 82 175 199 184 4828 4845 ( echo hi ); echo done 32 202 226 222 271 354 364 387 5001 4984 date | wc -l 33 202 226 239 271 354 364 387 4828 5002 ! date | wc -l 34 135 159 155 195 280 297 300 4935 4917 echo a | wc -l 35 135 159 155 195 280 357 300 4934 4916 command echo a | wc -l 36 202 226 231 271 354 364 416 5001 4983 command date | wc -l 37 202 226 248 271 354 364 416 4828 5002 ! command date | wc -l 38 202 226 222 271 362 371 395 4828 4983 ( date ) | wc -l 39 166 219 213 226 315 304 334 4951 4952 date | read x 40 136 160 158 196 281 276 301 4935 4917 { echo a; echo b; } | wc -l 41 138 161 177 197 283 307 303 4930 4930 { echo a; echo b; } | wc -l; echo done 42 204 228 227 287 387 348 419 5004 4986 { echo a; date; } | wc -l 43 136 160 158 196 281 304 301 4828 4917 ( echo a; echo b ) | wc -l 44 136 160 159 196 291 311 311 4820 4909 ( echo a; echo b ) | ( wc -l ) 45 137 161 163 212 322 290 341 4822 4912 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 92 90 200 201 210 4829 4842 echo hi & wait 47 129 151 159 167 274 268 297 4820 4901 date & wait 48 149 169 182 206 306 312 327 4828 4930 echo hi | wc -l & wait 49 212 232 249 282 380 378 414 4828 4997 date | wc -l & wait 50 130 152 167 168 310 275 333 4820 4903 trap 'echo mytrap' EXIT; date & wait 51 213 233 256 283 432 385 466 4822 4994 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 176 179 341 303 362 4820 4915 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 6937 8147 8555 9526 14468 14608 15719 253484 255642