Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4853 4854 echo hi 02 122 145 156 247 262 269 4934 4935 date 03 49 71 66 143 160 154 4853 4854 date ; 04 123 146 157 283 269 305 4856 4937 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4936 4937 date; echo hi 06 123 146 157 249 266 271 4936 4937 echo hi; date 07 191 216 241 335 356 355 5010 5011 date; date 08 191 216 241 335 357 355 5010 5011 { date; date; } 09 191 216 241 335 357 355 5010 5011 date; { date; } 10 201 225 250 353 387 373 5023 5024 . _tmp/sourced.sh 11 55 78 81 173 198 182 4853 4868 (echo hi) 12 122 145 158 255 268 277 4853 4935 (date) 13 122 145 158 263 274 285 4853 4935 ( ( date ) ) 14 123 146 159 265 278 287 4853 4937 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4853 4937 echo hi; (date) 16 123 146 159 257 272 279 4853 4937 echo hi; (date;) 17 56 79 82 174 202 183 4853 4869 echo hi; (echo hi;) 18 124 147 173 258 276 301 4853 4938 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4853 4870 ( echo hi ); echo hi 20 130 151 164 250 265 272 4943 4944 date > /tmp/redir.txt 21 125 148 166 258 271 280 4853 4944 (date;) > /tmp/sentence.txt 22 209 230 276 357 371 390 5033 5034 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4862 4863 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4853 4877 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 4968 4969 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4853 4951 (date; echo hi) 27 131 154 179 266 281 308 4943 4944 echo $(date) 28 63 87 101 184 208 192 4876 4877 echo $(echo hi) 29 131 154 179 296 287 316 4853 4944 echo $( ( date ) ) 30 140 164 195 299 316 319 4853 4961 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4853 4870 ( echo hi ); echo done 32 203 226 271 354 367 387 5026 5027 date | wc -l 33 203 226 271 354 367 387 4853 5027 ! date | wc -l 34 136 159 195 280 300 300 4959 4960 echo a | wc -l 35 136 159 195 280 360 300 4959 4960 command echo a | wc -l 36 203 226 271 354 368 416 5026 5027 command date | wc -l 37 203 226 271 354 367 416 4853 5027 ! command date | wc -l 38 203 226 272 362 374 395 4853 5027 ( date ) | wc -l 39 167 219 226 315 307 334 4976 4977 date | read x 40 137 160 196 281 306 301 4960 4961 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4962 4963 { echo a; echo b; } | wc -l; echo done 42 205 228 287 387 381 419 5029 5030 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4853 4961 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4853 4961 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4853 4962 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4853 4867 echo hi & wait 47 129 151 167 274 273 297 4853 4934 date & wait 48 148 169 206 306 317 327 4853 4955 echo hi | wc -l & wait 49 212 232 282 380 383 414 4853 5022 date | wc -l & wait 50 130 152 168 310 278 333 4853 4936 trap 'echo mytrap' EXIT; date & wait 51 213 233 283 432 389 466 4853 5024 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4853 4948 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7016 8227 9452 14464 15168 15650 254827 257471