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 4891 4892 echo hi 02 114 136 141 141 222 235 246 4972 4958 date 03 114 136 141 156 222 235 246 4972 4957 date ; 04 123 146 158 157 283 266 305 4894 4974 trap 'echo mytrap' EXIT; date 05 123 146 154 157 249 263 271 4969 4971 date; echo hi 06 115 137 145 157 224 239 271 4970 4956 echo hi; date 07 183 207 217 241 310 329 355 5048 5034 date; date 08 183 207 217 241 335 330 355 5044 5030 { date; date; } 09 183 207 217 241 335 330 355 5044 5030 date; { date; } 10 201 225 240 250 353 384 373 5061 5059 . _tmp/sourced.sh 11 47 69 75 81 173 171 182 4891 4892 (echo hi) 12 114 136 142 158 255 241 277 4891 4958 (date) 13 114 136 143 158 263 247 285 4887 4954 ( ( date ) ) 14 123 146 156 159 265 275 287 4887 4971 ( ( date ) ); echo hi 15 115 137 146 159 257 245 279 4887 4956 echo hi; (date) 16 115 137 146 159 257 245 279 4887 4956 echo hi; (date;) 17 48 70 78 82 174 175 183 4887 4889 echo hi; (echo hi;) 18 116 138 149 173 258 249 301 4887 4957 echo hi; (echo hi; date) 19 56 79 88 82 175 199 184 4887 4904 ( echo hi ); echo hi 20 120 140 146 164 250 241 272 4977 4961 date > /tmp/redir.txt 21 117 139 161 166 258 244 280 4887 4961 (date;) > /tmp/sentence.txt 22 208 230 227 276 357 367 390 5071 5053 date 2> /tmp/stderr.txt | wc -l 23 55 75 82 73 152 169 163 4896 4897 echo hi > /tmp/redir.txt 24 50 72 85 89 176 173 185 4890 4901 (echo hi;) > /tmp/sentence.txt 25 143 165 163 202 283 299 303 5006 4988 echo hi 2> /tmp/stderr.txt | wc -l 26 123 146 155 172 279 272 300 4887 4971 (date; echo hi) 27 131 154 166 179 266 278 308 4977 4978 echo $(date) 28 63 87 99 101 184 205 192 4910 4911 echo $(echo hi) 29 131 154 167 179 296 284 316 4887 4978 echo $( ( date ) ) 30 140 164 181 195 299 313 319 4887 4995 echo $( ( date ); echo hi ) 31 56 79 88 82 175 199 184 4887 4904 ( echo hi ); echo done 32 202 226 222 271 354 364 387 5060 5042 date | wc -l 33 202 226 239 271 354 364 387 4887 5061 ! date | wc -l 34 135 159 155 195 280 297 300 4993 4975 echo a | wc -l 35 135 159 155 195 280 357 300 4993 4974 command echo a | wc -l 36 202 226 231 271 354 364 416 5060 5042 command date | wc -l 37 202 226 248 271 354 364 416 4887 5061 ! command date | wc -l 38 202 226 222 271 362 371 395 4887 5042 ( date ) | wc -l 39 166 219 213 226 315 304 334 5010 5011 date | read x 40 136 160 158 196 281 276 301 4994 4976 { echo a; echo b; } | wc -l 41 138 161 177 197 283 307 303 4999 5003 { echo a; echo b; } | wc -l; echo done 42 204 228 227 287 387 348 419 5062 5045 { echo a; date; } | wc -l 43 136 160 158 196 281 304 301 4887 4976 ( echo a; echo b ) | wc -l 44 136 160 159 196 291 311 311 4891 4980 ( echo a; echo b ) | ( wc -l ) 45 137 161 163 212 322 290 341 4891 4981 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 92 90 200 201 210 4887 4901 echo hi & wait 47 129 151 159 167 274 268 297 4891 4972 date & wait 48 149 169 182 206 306 312 327 4887 4989 echo hi | wc -l & wait 49 213 232 245 282 380 378 414 4887 5056 date | wc -l & wait 50 130 152 167 168 310 275 333 4891 4974 trap 'echo mytrap' EXIT; date & wait 51 214 233 257 283 432 385 466 4891 5062 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 176 179 341 303 362 4891 4986 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 6939 8147 8552 9526 14468 14607 15719 256744 258905