Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4854 4855 echo hi 02 122 145 156 247 262 269 4935 4936 date 03 49 71 66 143 160 154 4854 4855 date ; 04 123 146 157 283 269 305 4857 4938 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4937 4938 date; echo hi 06 123 146 157 249 266 271 4937 4938 echo hi; date 07 191 216 241 335 356 355 5011 5012 date; date 08 191 216 241 335 357 355 5011 5012 { date; date; } 09 191 216 241 335 357 355 5011 5012 date; { date; } 10 201 225 250 353 387 373 5024 5025 . _tmp/sourced.sh 11 55 78 81 173 198 182 4854 4869 (echo hi) 12 122 145 158 255 268 277 4854 4936 (date) 13 122 145 158 263 274 285 4854 4936 ( ( date ) ) 14 123 146 159 265 278 287 4854 4938 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4854 4938 echo hi; (date) 16 123 146 159 257 272 279 4854 4938 echo hi; (date;) 17 56 79 82 174 202 183 4854 4870 echo hi; (echo hi;) 18 124 147 173 258 276 301 4854 4939 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4854 4871 ( echo hi ); echo hi 20 130 151 164 250 265 272 4944 4945 date > /tmp/redir.txt 21 125 148 166 258 271 280 4854 4945 (date;) > /tmp/sentence.txt 22 209 230 276 357 371 390 5034 5035 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4863 4864 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4854 4878 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 4969 4970 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4854 4952 (date; echo hi) 27 131 154 179 266 281 308 4944 4945 echo $(date) 28 63 87 101 184 208 192 4877 4878 echo $(echo hi) 29 131 154 179 296 287 316 4854 4945 echo $( ( date ) ) 30 140 164 195 299 316 319 4854 4962 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4854 4871 ( echo hi ); echo done 32 203 226 271 354 368 387 5027 5028 date | wc -l 33 203 226 271 354 367 387 4854 5028 ! date | wc -l 34 136 159 195 280 300 300 4960 4961 echo a | wc -l 35 136 159 195 280 360 300 4960 4961 command echo a | wc -l 36 203 226 271 354 367 416 5027 5028 command date | wc -l 37 203 226 271 354 367 416 4854 5028 ! command date | wc -l 38 203 226 271 362 373 395 4854 5028 ( date ) | wc -l 39 167 219 226 315 307 334 4977 4978 date | read x 40 137 160 196 281 306 301 4961 4962 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4963 4964 { echo a; echo b; } | wc -l; echo done 42 205 228 286 387 381 419 5030 5031 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4854 4962 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4854 4962 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4854 4963 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4854 4868 echo hi & wait 47 129 151 167 274 273 297 4854 4935 date & wait 48 145 169 206 306 317 327 4854 4956 echo hi | wc -l & wait 49 212 232 282 380 383 414 4854 5023 date | wc -l & wait 50 130 152 168 310 278 333 4854 4937 trap 'echo mytrap' EXIT; date & wait 51 213 233 283 432 388 466 4854 5025 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4854 4949 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7013 8227 9450 14464 15166 15650 254879 257523