Number of Syscalls ID dash ash yash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 74 66 142 162 153 4892 4893 echo hi 02 114 136 141 141 222 235 246 4973 4955 date 03 114 136 141 156 222 235 246 4973 4955 date ; 04 123 146 158 157 283 266 305 4895 4972 trap 'echo mytrap' EXIT; date 05 123 146 154 157 249 263 271 4977 4974 date; echo hi 06 115 137 145 157 224 239 271 4977 4963 echo hi; date 07 183 207 217 241 310 329 355 5049 5035 date; date 08 183 207 217 241 335 330 355 5051 5037 { date; date; } 09 183 207 217 241 335 330 355 5051 5037 date; { date; } 10 201 225 240 250 353 384 373 5064 5062 . _tmp/sourced.sh 11 47 69 75 81 173 171 182 4892 4889 (echo hi) 12 114 136 142 158 255 241 277 4892 4959 (date) 13 114 136 143 158 263 247 285 4894 4961 ( ( date ) ) 14 123 146 156 159 265 275 287 4894 4978 ( ( date ) ); echo hi 15 115 137 146 159 257 245 279 4894 4963 echo hi; (date) 16 115 137 146 159 257 245 279 4894 4963 echo hi; (date;) 17 48 70 78 82 174 175 183 4894 4896 echo hi; (echo hi;) 18 116 138 149 173 258 249 301 4894 4964 echo hi; (echo hi; date) 19 56 79 88 82 175 199 184 4894 4911 ( echo hi ); echo hi 20 120 140 146 164 250 241 272 4984 4968 date > /tmp/redir.txt 21 117 139 161 166 258 244 280 4894 4968 (date;) > /tmp/sentence.txt 22 208 230 227 276 357 368 390 5072 5054 date 2> /tmp/stderr.txt | wc -l 23 55 75 82 73 152 169 163 4903 4900 echo hi > /tmp/redir.txt 24 50 72 85 89 176 173 185 4892 4902 (echo hi;) > /tmp/sentence.txt 25 143 165 163 202 283 299 303 5007 4989 echo hi 2> /tmp/stderr.txt | wc -l 26 123 146 155 172 279 272 300 4894 4978 (date; echo hi) 27 131 154 166 179 266 278 308 4984 4985 echo $(date) 28 63 87 99 101 184 205 192 4917 4914 echo $(echo hi) 29 131 154 167 179 296 284 316 4894 4985 echo $( ( date ) ) 30 140 164 181 195 299 313 319 4890 5002 echo $( ( date ); echo hi ) 31 56 79 88 82 175 199 184 4894 4911 ( echo hi ); echo done 32 202 226 222 271 354 365 387 5067 5049 date | wc -l 33 202 226 239 271 354 364 387 4894 5068 ! date | wc -l 34 135 159 155 195 280 297 300 5000 4982 echo a | wc -l 35 135 159 155 195 280 357 300 5000 4982 command echo a | wc -l 36 202 226 231 271 354 364 416 5067 5049 command date | wc -l 37 202 226 248 271 354 364 416 4894 5068 ! command date | wc -l 38 202 226 222 271 362 371 395 4894 5049 ( date ) | wc -l 39 166 219 213 226 315 304 334 5017 5018 date | read x 40 136 160 158 196 281 276 301 5001 4983 { echo a; echo b; } | wc -l 41 138 161 177 197 283 307 303 5001 5004 { echo a; echo b; } | wc -l; echo done 42 204 228 227 287 387 348 419 5070 5052 { echo a; date; } | wc -l 43 136 160 158 196 281 304 301 4894 4983 ( echo a; echo b ) | wc -l 44 136 160 159 196 291 311 311 4892 4981 ( echo a; echo b ) | ( wc -l ) 45 137 161 163 212 322 290 341 4892 4982 { echo prefix; ( echo a; echo b ); } | ( wc -l ) 46 62 84 92 90 200 201 210 4890 4908 echo hi & wait 47 129 151 159 167 274 268 297 4892 4973 date & wait 48 149 169 182 206 306 312 327 4890 4996 echo hi | wc -l & wait 49 212 232 249 283 380 378 414 4890 5063 date | wc -l & wait 50 130 152 167 168 310 275 333 4892 4975 trap 'echo mytrap' EXIT; date & wait 51 213 233 256 283 432 385 466 4892 5063 trap 'echo mytrap' EXIT; date | wc -l & wait 52 138 160 176 179 341 303 362 4892 4987 { trap 'echo mytrap' EXIT; date; } & wait TOTAL 6937 8147 8555 9527 14468 14609 15719 256990 259138