Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4862 4863 echo hi 02 122 145 156 247 262 269 4943 4944 date 03 49 71 66 143 160 154 4862 4863 date ; 04 123 146 157 283 269 305 4865 4946 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4945 4946 date; echo hi 06 123 146 157 249 266 271 4945 4946 echo hi; date 07 191 216 241 335 356 355 5019 5020 date; date 08 191 216 241 335 357 355 5019 5020 { date; date; } 09 191 216 241 335 357 355 5019 5020 date; { date; } 10 201 225 250 353 387 373 5032 5033 . _tmp/sourced.sh 11 55 78 81 173 198 182 4862 4877 (echo hi) 12 122 145 158 255 268 277 4862 4944 (date) 13 122 145 158 263 274 285 4862 4944 ( ( date ) ) 14 123 146 159 265 278 287 4862 4946 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4862 4946 echo hi; (date) 16 123 146 159 257 272 279 4862 4946 echo hi; (date;) 17 56 79 82 174 202 183 4862 4878 echo hi; (echo hi;) 18 124 147 173 258 276 301 4862 4947 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4862 4879 ( echo hi ); echo hi 20 130 151 164 250 265 272 4952 4953 date > /tmp/redir.txt 21 125 148 166 258 271 280 4862 4953 (date;) > /tmp/sentence.txt 22 209 230 276 357 371 390 5042 5043 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4871 4872 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4862 4886 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 4977 4978 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4862 4960 (date; echo hi) 27 131 154 179 266 281 308 4952 4953 echo $(date) 28 63 87 101 184 208 192 4885 4886 echo $(echo hi) 29 131 154 179 296 287 316 4862 4953 echo $( ( date ) ) 30 140 164 195 299 316 319 4862 4970 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4862 4879 ( echo hi ); echo done 32 203 226 271 354 367 387 5035 5036 date | wc -l 33 203 226 271 354 367 387 4862 5036 ! date | wc -l 34 137 159 195 280 300 300 4968 4969 echo a | wc -l 35 136 159 195 280 360 300 4968 4969 command echo a | wc -l 36 203 226 271 354 367 416 5035 5036 command date | wc -l 37 203 226 271 354 367 416 4862 5036 ! command date | wc -l 38 203 226 272 362 373 395 4862 5036 ( date ) | wc -l 39 167 219 226 315 307 334 4985 4986 date | read x 40 137 160 196 281 306 301 4969 4970 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4971 4972 { echo a; echo b; } | wc -l; echo done 42 205 228 287 387 381 419 5038 5039 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4862 4970 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4862 4970 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4862 4971 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4862 4876 echo hi & wait 47 129 151 167 274 273 297 4862 4943 date & wait 48 149 169 206 306 317 327 4862 4964 echo hi | wc -l & wait 49 215 232 282 380 383 414 4862 5031 date | wc -l & wait 50 130 152 168 310 278 333 4862 4945 trap 'echo mytrap' EXIT; date & wait 51 213 233 283 432 388 466 4862 5033 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4862 4957 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7021 8227 9452 14464 15165 15650 255295 257939