Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4889 4890 echo hi 02 122 145 156 247 262 269 4970 4971 date 03 49 71 66 143 160 154 4888 4890 date ; 04 123 146 157 283 269 305 4892 4973 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4972 4973 date; echo hi 06 123 146 157 249 266 271 4973 4973 echo hi; date 07 191 216 241 335 356 355 5046 5047 date; date 08 191 216 241 335 357 355 5051 5047 { date; date; } 09 191 216 241 335 357 355 5051 5047 date; { date; } 10 201 225 250 353 387 373 5060 5061 . _tmp/sourced.sh 11 55 78 81 173 198 182 4889 4904 (echo hi) 12 122 145 158 255 268 277 4889 4971 (date) 13 122 145 158 263 274 285 4889 4971 ( ( date ) ) 14 123 146 159 265 278 287 4889 4973 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4889 4973 echo hi; (date) 16 123 146 159 257 272 279 4889 4973 echo hi; (date;) 17 56 79 82 174 202 183 4889 4905 echo hi; (echo hi;) 18 124 147 173 258 276 301 4889 4974 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4889 4906 ( echo hi ); echo hi 20 130 151 164 250 265 272 4980 4980 date > /tmp/redir.txt 21 125 148 166 258 271 280 4889 4981 (date;) > /tmp/sentence.txt 22 209 230 277 357 371 390 5074 5071 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4898 4899 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4889 4914 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 5006 5007 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4889 4988 (date; echo hi) 27 131 154 179 266 281 308 4979 4980 echo $(date) 28 63 87 101 184 208 192 4912 4913 echo $(echo hi) 29 131 154 179 296 287 316 4889 4980 echo $( ( date ) ) 30 140 164 195 299 316 319 4889 4997 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4889 4906 ( echo hi ); echo done 32 203 226 271 354 367 387 5064 5064 date | wc -l 33 203 226 271 354 367 387 4889 5064 ! date | wc -l 34 136 159 195 280 300 300 4996 4997 echo a | wc -l 35 136 159 195 280 360 300 4997 4997 command echo a | wc -l 36 203 226 271 354 367 416 5065 5064 command date | wc -l 37 203 226 271 354 367 416 4889 5063 ! command date | wc -l 38 203 226 271 362 374 395 4889 5064 ( date ) | wc -l 39 167 219 226 315 307 334 5013 5014 date | read x 40 137 160 196 281 306 301 4998 4998 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 5000 5000 { echo a; echo b; } | wc -l; echo done 42 205 228 286 387 381 419 5067 5068 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4889 4998 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4889 4997 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4889 4998 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4889 4903 echo hi & wait 47 129 151 167 274 273 297 4889 4970 date & wait 48 145 169 206 306 317 327 4889 4991 echo hi | wc -l & wait 49 213 232 282 380 383 414 4889 5058 date | wc -l & wait 50 130 152 168 310 278 333 4889 4972 trap 'echo mytrap' EXIT; date & wait 51 213 233 283 432 388 466 4889 5063 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4889 4985 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7014 8227 9451 14464 15166 15650 256733 259366