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 4852 4853 echo hi 02 114 136 141 141 222 235 246 4933 4919 date 03 114 136 141 156 222 235 246 4933 4919 date ; 04 123 146 158 157 283 266 305 4855 4936 trap 'echo mytrap' EXIT; date 05 123 146 154 157 249 263 271 4907 4908 date; echo hi 06 115 137 145 157 224 239 271 4907 4893 echo hi; date 07 183 207 217 241 310 329 355 5009 4995 date; date 08 183 207 217 241 335 330 355 4981 4967 { date; date; } 09 183 207 217 241 335 330 355 4981 4967 date; { date; } 10 201 225 240 250 353 384 373 4994 4995 . _tmp/sourced.sh 11 47 69 75 81 173 171 182 4852 4853 (echo hi) 12 114 136 142 158 255 241 277 4852 4919 (date) 13 114 136 143 158 263 247 285 4824 4891 ( ( date ) ) 14 123 146 156 159 265 275 287 4824 4908 ( ( date ) ); echo hi 15 115 137 146 159 257 245 279 4824 4893 echo hi; (date) 16 115 137 146 159 257 245 279 4824 4893 echo hi; (date;) 17 48 70 78 82 174 175 183 4824 4826 echo hi; (echo hi;) 18 116 138 149 173 258 249 301 4824 4894 echo hi; (echo hi; date) 19 56 79 88 82 175 199 184 4824 4841 ( echo hi ); echo hi 20 120 140 146 164 250 241 272 4914 4898 date > /tmp/redir.txt 21 117 139 161 166 258 244 280 4824 4898 (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 4833 4834 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 4824 4908 (date; echo hi) 27 131 154 166 179 266 278 308 4914 4915 echo $(date) 28 63 87 99 101 184 205 192 4847 4848 echo $(echo hi) 29 131 154 167 179 296 284 316 4824 4915 echo $( ( date ) ) 30 140 164 181 195 299 313 319 4824 4932 echo $( ( date ); echo hi ) 31 56 79 88 82 175 199 184 4824 4841 ( echo hi ); echo done 32 202 226 222 272 354 364 387 4997 4979 date | wc -l 33 202 226 239 271 354 364 387 4824 4998 ! date | wc -l 34 135 159 155 195 280 297 300 4930 4912 echo a | wc -l 35 135 159 155 195 280 357 300 4930 4912 command echo a | wc -l 36 202 226 231 271 354 364 416 4997 4979 command date | wc -l 37 202 226 248 271 354 364 416 4824 4998 ! command date | wc -l 38 202 226 222 271 362 371 395 4824 4979 ( date ) | wc -l 39 166 219 213 226 315 304 334 4947 4948 date | read x 40 136 160 158 196 281 276 301 4931 4913 { echo a; echo b; } | wc -l 41 138 161 177 197 283 307 303 4961 4962 { echo a; echo b; } | wc -l; echo done 42 204 228 227 287 387 348 419 5000 4982 { echo a; date; } | wc -l 43 136 160 158 196 281 304 301 4824 4913 ( 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 4852 4942 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 92 90 200 201 210 4824 4838 echo hi & wait 47 129 151 159 167 274 268 297 4852 4933 date & wait 48 148 165 182 206 306 312 327 4824 4926 echo hi | wc -l & wait 49 212 232 245 283 380 378 414 4824 4993 date | wc -l & wait 50 130 152 167 168 310 275 333 4852 4935 trap 'echo mytrap' EXIT; date & wait 51 213 233 257 283 432 385 466 4852 5023 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 6936 8143 8552 9528 14468 14608 15719 253876 256037