Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4857 4858 echo hi 02 122 145 156 247 262 269 4938 4939 date 03 49 71 66 143 160 154 4857 4858 date ; 04 123 146 157 283 269 305 4860 4941 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4940 4941 date; echo hi 06 123 146 157 249 266 271 4940 4941 echo hi; date 07 191 216 241 335 356 355 5014 5015 date; date 08 191 216 241 335 357 355 5014 5015 { date; date; } 09 191 216 241 335 357 355 5014 5015 date; { date; } 10 201 225 250 353 387 373 5027 5028 . _tmp/sourced.sh 11 55 78 81 173 198 182 4857 4872 (echo hi) 12 122 145 158 255 268 277 4857 4939 (date) 13 122 145 158 263 274 285 4857 4939 ( ( date ) ) 14 123 146 159 265 278 287 4857 4941 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4857 4941 echo hi; (date) 16 123 146 159 257 272 279 4857 4941 echo hi; (date;) 17 56 79 82 174 202 183 4857 4873 echo hi; (echo hi;) 18 124 147 173 258 276 301 4857 4942 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4857 4874 ( echo hi ); echo hi 20 130 151 164 250 265 272 4947 4948 date > /tmp/redir.txt 21 125 148 166 258 271 280 4857 4948 (date;) > /tmp/sentence.txt 22 208 230 276 357 371 390 5037 5038 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4866 4867 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4857 4881 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 4972 4973 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4857 4955 (date; echo hi) 27 131 154 179 266 281 308 4947 4948 echo $(date) 28 63 87 101 184 208 192 4880 4881 echo $(echo hi) 29 131 154 179 296 287 316 4857 4948 echo $( ( date ) ) 30 140 164 195 299 316 319 4857 4965 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4857 4874 ( echo hi ); echo done 32 203 226 271 354 368 387 5030 5031 date | wc -l 33 203 226 271 354 367 387 4857 5031 ! date | wc -l 34 136 159 195 280 300 300 4963 4964 echo a | wc -l 35 136 159 195 280 360 300 4963 4964 command echo a | wc -l 36 203 226 271 354 367 416 5030 5031 command date | wc -l 37 203 226 271 354 367 416 4857 5031 ! command date | wc -l 38 203 226 271 362 374 395 4857 5031 ( date ) | wc -l 39 167 219 226 315 307 334 4980 4981 date | read x 40 137 160 196 281 306 301 4964 4965 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4966 4967 { echo a; echo b; } | wc -l; echo done 42 205 228 286 387 381 419 5033 5034 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4857 4965 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4857 4965 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4857 4966 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4857 4871 echo hi & wait 47 129 151 167 274 273 297 4857 4938 date & wait 48 149 169 206 306 317 327 4857 4959 echo hi | wc -l & wait 49 212 232 282 380 384 414 4857 5026 date | wc -l & wait 50 130 152 168 310 278 333 4857 4940 trap 'echo mytrap' EXIT; date & wait 51 213 233 283 432 388 466 4857 5028 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4857 4952 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7016 8227 9450 14464 15168 15650 255035 257679