Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4871 4872 echo hi 02 122 145 156 247 262 269 4952 4953 date 03 49 71 66 143 160 154 4871 4872 date ; 04 123 146 157 283 269 305 4858 4939 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4954 4955 date; echo hi 06 123 146 157 249 266 271 4954 4955 echo hi; date 07 191 216 241 335 356 355 5028 5029 date; date 08 191 216 241 335 357 355 5028 5029 { date; date; } 09 191 216 241 335 357 355 5028 5029 date; { date; } 10 201 225 250 353 387 373 5041 5042 . _tmp/sourced.sh 11 55 78 81 173 198 182 4871 4886 (echo hi) 12 122 145 158 255 268 277 4871 4953 (date) 13 122 145 158 263 274 285 4871 4953 ( ( date ) ) 14 123 146 159 265 278 287 4855 4939 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4871 4955 echo hi; (date) 16 123 146 159 257 272 279 4871 4955 echo hi; (date;) 17 56 79 82 174 202 183 4871 4887 echo hi; (echo hi;) 18 124 147 173 258 276 301 4855 4940 echo hi; (echo hi; date) 19 56 79 82 175 202 184 4855 4872 ( echo hi ); echo hi 20 130 151 164 250 265 272 4945 4946 date > /tmp/redir.txt 21 125 148 166 258 271 280 4855 4946 (date;) > /tmp/sentence.txt 22 209 230 276 357 370 390 5035 5036 date 2> /tmp/stderr.txt | wc -l 23 55 75 73 152 172 163 4864 4865 echo hi > /tmp/redir.txt 24 58 81 89 176 200 185 4855 4879 (echo hi;) > /tmp/sentence.txt 25 144 165 202 283 302 303 4970 4971 echo hi 2> /tmp/stderr.txt | wc -l 26 131 154 172 279 299 300 4871 4969 (date; echo hi) 27 131 154 179 266 281 308 4961 4962 echo $(date) 28 63 87 101 184 208 192 4894 4895 echo $(echo hi) 29 131 154 179 296 287 316 4871 4962 echo $( ( date ) ) 30 140 164 195 299 316 319 4855 4963 echo $( ( date ); echo hi ) 31 56 79 82 175 202 184 4855 4872 ( echo hi ); echo done 32 203 226 271 354 367 387 5044 5045 date | wc -l 33 203 226 271 354 367 387 4871 5045 ! date | wc -l 34 136 159 195 280 300 300 4977 4978 echo a | wc -l 35 136 159 195 280 360 300 4961 4962 command echo a | wc -l 36 203 226 271 354 368 416 5028 5029 command date | wc -l 37 203 226 272 354 367 416 4855 5029 ! command date | wc -l 38 203 226 271 362 374 395 4871 5045 ( date ) | wc -l 39 167 219 226 315 307 334 4994 4995 date | read x 40 137 160 196 281 306 301 4962 4963 { echo a; echo b; } | wc -l 41 138 161 197 283 310 303 4964 4965 { echo a; echo b; } | wc -l; echo done 42 205 228 287 387 381 419 5031 5032 { echo a; date; } | wc -l 43 137 160 196 281 307 301 4855 4963 ( echo a; echo b ) | wc -l 44 137 160 196 291 314 311 4855 4963 ( echo a; echo b ) | ( wc -l ) 45 138 161 212 322 325 341 4855 4964 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 90 200 206 210 4871 4885 echo hi & wait 47 129 151 167 274 273 297 4871 4952 date & wait 48 149 169 206 306 317 327 4855 4957 echo hi | wc -l & wait 49 212 232 282 380 383 414 4871 5040 date | wc -l & wait 50 130 152 168 310 278 333 4855 4938 trap 'echo mytrap' EXIT; date & wait 51 213 233 284 432 388 466 4855 5026 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 179 341 308 362 4855 4950 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 7017 8227 9453 14464 15166 15650 255363 258007