Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4868 4869 echo hi 02 122 145 156 247 262 269 4949 4950 date 03 49 71 66 143 160 154 4868 4869 date ; 04 123 146 157 283 269 305 4885 4966 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4951 4952 date; echo hi 06 123 146 157 249 266 271 4951 4952 echo hi; date 07 191 216 241 335 356 355 5025 5026 date; date 08 191 216 241 335 357 355 5025 5026 { date; date; } 09 191 216 241 335 357 355 5025 5026 date; { date; } 10 201 225 250 353 387 373 5038 5039 . _tmp/sourced.sh 11 55 78 81 173 198 182 4868 4883 (echo hi) 12 122 145 158 255 268 277 4868 4950 (date) 13 122 145 158 263 274 285 4868 4950 ( ( date ) ) 14 123 146 159 265 278 287 4882 4966 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4868 4952 echo hi; (date) 16 123 146 159 257 272 279 4868 4952 echo hi; (date;) 17 56 79 82 174 202 183 4868 4884 echo hi; (echo hi;) 18 124 147 173 258 276 301 4882 4967 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4882 4899 ( echo hi ); echo hi 20 130 151 164 250 265 272 4972 4973 date > /tmp/redir.txt 21 125 148 166 258 271 280 4882 4973 (date;) > /tmp/sentence.txt 22 209 230 276 357 370 390 5062 5063 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4891 4892 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4882 4906 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 4997 4998 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4868 4966 (date; echo hi) 27 131 154 179 266 281 308 4958 4959 echo $(date) 28 63 87 101 184 208 192 4891 4892 echo $(echo hi) 29 131 154 179 296 287 316 4868 4959 echo $( ( date ) ) 30 140 164 195 299 316 319 4882 4990 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4882 4899 ( echo hi ); echo done 32 203 226 272 354 367 387 5041 5042 date | wc -l 33 203 226 272 354 367 387 4868 5042 ! date | wc -l 34 137 159 195 280 300 300 4974 4975 echo a | wc -l 35 136 159 195 280 360 300 4988 4989 command echo a | wc -l 36 203 226 271 354 367 416 5055 5056 command date | wc -l 37 203 226 271 354 367 416 4882 5056 ! command date | wc -l 38 203 226 271 362 374 395 4868 5042 ( date ) | wc -l 39 167 219 226 315 307 334 4991 4992 date | read x 40 137 160 196 281 306 301 4989 4990 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4977 4978 { echo a; echo b; } | wc -l; echo done 42 205 228 286 387 381 419 5058 5059 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4882 4990 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4882 4990 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4868 4977 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4868 4882 echo hi & wait 47 129 151 167 274 273 297 4868 4949 date & wait 48 148 169 206 306 317 327 4882 4984 echo hi | wc -l & wait 49 215 232 282 380 383 414 4868 5037 date | wc -l & wait 50 130 152 168 310 278 333 4868 4951 trap 'echo mytrap' EXIT; date & wait 51 214 233 283 432 388 466 4868 5039 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4868 4963 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7021 8227 9452 14464 15165 15650 255887 258531