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 4853 4854 echo hi 02 114 136 141 141 222 235 246 4934 4920 date 03 114 136 141 156 222 235 246 4934 4920 date ; 04 123 146 158 157 283 266 305 4874 4955 trap 'echo mytrap' EXIT; date 05 123 146 154 157 249 263 271 4906 4907 date; echo hi 06 115 137 145 157 224 239 271 4906 4892 echo hi; date 07 183 207 217 241 310 329 355 5010 4996 date; date 08 183 207 217 241 335 330 355 4980 4966 { date; date; } 09 183 207 217 241 335 330 355 4980 4966 date; { date; } 10 201 225 240 250 353 384 373 4993 4994 . _tmp/sourced.sh 11 47 69 75 81 173 171 182 4853 4854 (echo hi) 12 114 136 142 158 255 241 277 4853 4920 (date) 13 114 136 143 158 263 247 285 4823 4890 ( ( date ) ) 14 123 146 156 159 265 275 287 4823 4907 ( ( date ) ); echo hi 15 115 137 146 159 257 245 279 4823 4892 echo hi; (date) 16 115 137 146 159 257 245 279 4823 4892 echo hi; (date;) 17 48 70 78 82 174 175 183 4823 4825 echo hi; (echo hi;) 18 116 138 149 173 258 249 301 4823 4893 echo hi; (echo hi; date) 19 56 79 88 82 175 199 184 4823 4840 ( echo hi ); echo hi 20 120 140 146 164 250 241 272 4913 4897 date > /tmp/redir.txt 21 117 139 161 166 258 244 280 4823 4897 (date;) > /tmp/sentence.txt 22 208 230 227 277 357 368 390 5051 5033 date 2> /tmp/stderr.txt | wc -l 23 55 75 82 73 152 169 163 4832 4833 echo hi > /tmp/redir.txt 24 50 72 85 89 176 173 185 4871 4881 (echo hi;) > /tmp/sentence.txt 25 143 165 163 202 283 299 303 4986 4968 echo hi 2> /tmp/stderr.txt | wc -l 26 123 146 155 172 279 272 300 4823 4907 (date; echo hi) 27 131 154 166 179 266 278 308 4913 4914 echo $(date) 28 63 87 99 101 184 205 192 4846 4847 echo $(echo hi) 29 131 154 167 179 296 284 316 4823 4914 echo $( ( date ) ) 30 140 164 181 195 299 313 319 4823 4931 echo $( ( date ); echo hi ) 31 56 79 88 82 175 199 184 4823 4840 ( echo hi ); echo done 32 202 226 222 271 354 364 387 4996 4978 date | wc -l 33 202 226 239 271 354 364 387 4823 4997 ! date | wc -l 34 135 159 155 195 280 297 300 4929 4911 echo a | wc -l 35 135 159 155 195 280 357 300 4929 4911 command echo a | wc -l 36 202 226 231 271 354 364 416 4996 4978 command date | wc -l 37 202 226 248 271 354 364 416 4823 4997 ! command date | wc -l 38 202 226 222 272 362 370 395 4823 4978 ( date ) | wc -l 39 166 219 213 226 315 304 334 4946 4947 date | read x 40 136 160 158 196 281 276 301 4930 4912 { echo a; echo b; } | wc -l 41 138 161 177 197 283 307 303 4980 4981 { echo a; echo b; } | wc -l; echo done 42 204 228 227 287 387 348 419 4999 4981 { echo a; date; } | wc -l 43 136 160 158 196 281 304 301 4823 4912 ( echo a; echo b ) | wc -l 44 136 160 159 196 291 311 311 4871 4960 ( echo a; echo b ) | ( wc -l ) 45 137 161 163 212 322 290 341 4855 4945 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 92 90 200 201 210 4823 4837 echo hi & wait 47 129 151 159 167 274 268 297 4853 4934 date & wait 48 148 169 182 206 306 312 327 4823 4925 echo hi | wc -l & wait 49 212 232 249 282 380 378 414 4823 4992 date | wc -l & wait 50 130 152 167 168 310 275 333 4871 4954 trap 'echo mytrap' EXIT; date & wait 51 213 233 257 283 432 385 466 4855 5026 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 176 179 341 303 362 4871 4966 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 6936 8147 8556 9528 14468 14607 15719 254006 256167