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 4851 4852 echo hi 02 114 136 141 141 222 235 246 4932 4918 date 03 114 136 141 156 222 235 246 4932 4918 date ; 04 123 146 158 157 283 266 305 4854 4935 trap 'echo mytrap' EXIT; date 05 123 146 154 157 249 263 271 4904 4905 date; echo hi 06 115 137 145 157 224 239 271 4904 4890 echo hi; date 07 183 207 217 241 310 329 355 5008 4994 date; date 08 183 207 217 241 335 330 355 4978 4964 { date; date; } 09 183 207 217 241 335 330 355 4978 4964 date; { date; } 10 201 225 240 250 353 384 373 4991 4992 . _tmp/sourced.sh 11 47 69 75 81 173 171 182 4851 4852 (echo hi) 12 114 136 142 158 255 241 277 4851 4918 (date) 13 114 136 143 158 263 247 285 4821 4888 ( ( date ) ) 14 123 146 156 159 265 275 287 4821 4905 ( ( date ) ); echo hi 15 115 137 146 159 257 245 279 4821 4890 echo hi; (date) 16 115 137 146 159 257 245 279 4821 4890 echo hi; (date;) 17 48 70 78 82 174 175 183 4821 4823 echo hi; (echo hi;) 18 116 138 149 173 258 249 301 4821 4891 echo hi; (echo hi; date) 19 56 79 88 82 175 199 184 4821 4838 ( echo hi ); echo hi 20 120 140 146 164 250 241 272 4911 4895 date > /tmp/redir.txt 21 117 139 161 166 258 244 280 4821 4895 (date;) > /tmp/sentence.txt 22 208 230 227 276 357 367 390 5031 5013 date 2> /tmp/stderr.txt | wc -l 23 55 75 82 73 152 169 163 4830 4831 echo hi > /tmp/redir.txt 24 50 72 85 89 176 173 185 4851 4861 (echo hi;) > /tmp/sentence.txt 25 143 165 163 202 283 299 303 4966 4948 echo hi 2> /tmp/stderr.txt | wc -l 26 123 146 155 172 279 272 300 4821 4905 (date; echo hi) 27 131 154 166 179 266 278 308 4911 4912 echo $(date) 28 63 87 99 101 184 205 192 4844 4845 echo $(echo hi) 29 131 154 167 179 296 284 316 4821 4912 echo $( ( date ) ) 30 140 164 181 195 299 313 319 4821 4929 echo $( ( date ); echo hi ) 31 56 79 88 82 175 199 184 4821 4838 ( echo hi ); echo done 32 202 226 222 271 354 364 387 4994 4976 date | wc -l 33 202 226 239 271 354 364 387 4821 4995 ! date | wc -l 34 135 159 155 195 280 297 300 4927 4909 echo a | wc -l 35 135 159 155 195 280 357 300 4927 4909 command echo a | wc -l 36 202 226 231 271 354 364 416 4994 4976 command date | wc -l 37 202 226 248 271 354 364 416 4821 4995 ! command date | wc -l 38 202 226 222 271 362 371 395 4821 4976 ( date ) | wc -l 39 166 219 213 226 315 304 334 4944 4945 date | read x 40 136 160 158 196 281 276 301 4928 4910 { echo a; echo b; } | wc -l 41 138 161 177 197 283 307 303 4960 4961 { echo a; echo b; } | wc -l; echo done 42 204 228 227 287 387 348 419 4996 4979 { echo a; date; } | wc -l 43 136 160 158 196 281 304 301 4821 4910 ( echo a; echo b ) | wc -l 44 136 160 159 196 291 311 311 4851 4940 ( echo a; echo b ) | ( wc -l ) 45 137 161 163 212 322 290 341 4851 4941 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 92 90 200 201 210 4821 4835 echo hi & wait 47 129 151 159 167 274 268 297 4851 4932 date & wait 48 145 169 182 206 306 312 327 4821 4923 echo hi | wc -l & wait 49 212 235 249 282 380 378 414 4821 4990 date | wc -l & wait 50 130 152 167 168 310 275 333 4851 4934 trap 'echo mytrap' EXIT; date & wait 51 213 233 257 283 432 385 466 4851 5022 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 176 179 341 303 362 4851 4946 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 6933 8150 8556 9526 14468 14607 15719 253753 255915