Number of Syscalls ID dash ash mksh bash-5 zsh bash-4 ysh-py osh-py Description 01 47 69 66 142 165 153 4869 4870 echo hi 02 122 145 156 247 262 269 4950 4951 date 03 49 71 66 143 160 154 4869 4870 date ; 04 123 146 157 283 269 305 4860 4941 trap 'echo mytrap' EXIT; date 05 123 146 157 249 266 271 4952 4953 date; echo hi 06 123 146 157 249 266 271 4952 4953 echo hi; date 07 191 216 241 335 356 355 5026 5027 date; date 08 191 216 241 335 357 355 5026 5027 { date; date; } 09 191 216 241 335 357 355 5026 5027 date; { date; } 10 201 225 250 353 387 373 5039 5040 . _tmp/sourced.sh 11 55 78 81 173 198 182 4869 4884 (echo hi) 12 122 145 158 255 268 277 4869 4951 (date) 13 122 145 158 263 274 285 4869 4951 ( ( date ) ) 14 123 146 159 265 278 287 4857 4941 ( ( date ) ); echo hi 15 123 146 159 257 272 279 4869 4953 echo hi; (date) 16 123 146 159 257 272 279 4869 4953 echo hi; (date;) 17 56 79 82 174 202 183 4869 4885 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 22 209 230 276 357 370 390 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 4869 4967 (date; echo hi) 27 131 154 179 266 281 308 4959 4960 echo $(date) 28 63 87 101 184 208 192 4892 4893 echo $(echo hi) 29 131 154 179 296 287 316 4869 4960 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 32 203 226 271 354 367 387 5042 5043 date | wc -l 33 203 226 272 354 367 387 4869 5043 ! date | wc -l 34 136 159 195 280 300 300 4975 4976 echo a | wc -l 35 136 159 195 280 360 300 4963 4964 command echo a | wc -l 36 203 226 272 354 367 416 5030 5031 command date | wc -l 37 203 226 271 354 368 416 4857 5031 ! command date | wc -l 38 203 226 271 362 374 395 4869 5043 ( date ) | wc -l 39 167 219 226 315 307 334 4992 4993 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 42 205 228 287 387 381 419 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 4869 4883 echo hi & wait 47 129 151 167 274 273 297 4869 4950 date & wait 48 145 169 206 306 317 327 4857 4959 echo hi | wc -l & wait 49 212 235 282 380 384 414 4869 5038 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 7013 8230 9453 14464 15167 15650 255359 258003