Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4836 4837 echo hi 02 122 145 156 247 262 269 4917 4918 date 03 49 71 66 143 160 154 4836 4837 date ; 04 123 146 157 283 269 305 4839 4920 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4919 4920 date; echo hi 06 123 146 157 249 266 271 4919 4920 echo hi; date 07 191 216 241 335 356 355 4993 4994 date; date 08 191 216 241 335 357 355 4994 4994 { date; date; } 09 191 216 241 335 357 355 4993 4994 date; { date; } 10 201 225 250 353 387 373 5007 5008 . _tmp/sourced.sh 11 55 78 81 173 198 182 4836 4851 (echo hi) 12 122 145 158 255 268 277 4836 4918 (date) 13 122 145 158 263 274 285 4836 4918 ( ( date ) ) 14 123 146 159 265 278 287 4836 4920 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4836 4920 echo hi; (date) 16 123 146 159 257 272 279 4836 4920 echo hi; (date;) 17 56 79 82 174 202 183 4836 4852 echo hi; (echo hi;) 18 124 147 173 258 276 301 4836 4921 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4836 4853 ( echo hi ); echo hi 20 130 151 164 250 265 272 4927 4927 date > /tmp/redir.txt 21 125 148 166 258 271 280 4836 4928 (date;) > /tmp/sentence.txt 22 209 230 277 357 371 390 5019 5017 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4845 4846 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4836 4861 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 4954 4953 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4836 4934 (date; echo hi) 27 131 154 179 266 281 308 4926 4927 echo $(date) 28 63 87 101 184 208 192 4859 4860 echo $(echo hi) 29 131 154 179 296 287 316 4836 4927 echo $( ( date ) ) 30 140 164 195 299 316 319 4836 4944 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4836 4853 ( echo hi ); echo done 32 203 226 271 354 368 387 5011 5010 date | wc -l 33 203 226 271 354 367 387 4836 5011 ! date | wc -l 34 136 159 195 280 300 300 4945 4943 echo a | wc -l 35 136 159 195 280 360 300 4945 4943 command echo a | wc -l 36 203 226 271 354 367 416 5012 5010 command date | wc -l 37 203 226 272 354 367 416 4836 5011 ! command date | wc -l 38 203 226 271 362 373 395 4836 5010 ( date ) | wc -l 39 167 219 226 315 307 334 4960 4961 date | read x 40 137 160 196 281 306 301 4944 4944 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4947 4947 { echo a; echo b; } | wc -l; echo done 42 205 228 286 387 381 419 5017 5013 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4836 4944 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4836 4944 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4836 4945 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4836 4850 echo hi & wait 47 129 151 167 274 273 297 4836 4917 date & wait 48 149 169 206 306 317 327 4836 4938 echo hi | wc -l & wait 49 212 232 282 380 383 414 4836 5005 date | wc -l & wait 50 130 152 168 310 278 333 4836 4919 trap 'echo mytrap' EXIT; date & wait 51 213 233 283 432 388 466 4836 5010 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4836 4933 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7017 8227 9452 14464 15166 15650 253972 256600