Test Name Wall(ms) Comp(ms) Exec(ms) Instrs GC Ct IC Rate Sess Objs Sess B Peak B Ret B ------------------------------------------------------------------------------------------------------------------------------------------------------ arith_ops 398.27 0.364 397.901 4500023 0 0.0% 0 0 0 0 array_filter 763.82 0.308 763.510 55739 7 99.9% 23926 3384790 4289610 3416 array_for_each 780.10 0.313 779.784 35737 7 99.9% 19792 2812434 4283158 1184 array_index_get 160.07 0.249 159.819 1817037 0 99.9% 1 38160 38160 8352 array_index_set 130.22 0.240 129.982 1517035 0 99.9% 1 38160 38160 8352 array_join 661.14 0.279 660.857 4140029 4 100.0% 6664 2572096 6114922 339 array_literal 124.47 0.236 124.228 1500025 3 0.0% 4410 811440 4194832 184 array_map 771.81 0.315 771.492 55739 8 99.9% 4894 833070 4302356 4568 array_push_pop 1624.93 0.277 1624.651 10200029 9 100.0% 2403 4575684 10261192 552 array_reduce 767.58 0.345 767.233 57739 7 99.9% 19792 2812482 4283206 2384 array_slice 116.92 0.300 116.616 79739 5 99.9% 485 867734 7434652 4568 array_sort 167.37 0.317 167.048 17939 3 99.7% 4331 1576574 4203242 4568 branch_if 199.72 0.230 199.487 2816690 0 0.0% 0 0 0 0 branch_switch 198.48 0.336 198.143 3000023 0 0.0% 0 0 0 0 call_args 119.65 0.330 119.322 880029 0 0.0% 20002 2720307 2720307 715 call_closure 84.16 0.294 83.861 500044 0 0.0% 20005 2720749 2720749 1461 call_method 96.11 0.251 95.860 580033 0 50.0% 20003 2720443 2720443 907 call_new_proto 176.92 0.277 176.639 800037 2 33.3% 29171 3968494 4194310 1694 call_recursion 1204.70 0.304 1204.395 5724629 13 0.0% 24519 3336595 4199771 715 call_this 167.85 0.296 167.557 780036 2 50.0% 9171 1248432 4194320 1632 cmp_ops 553.80 0.220 553.579 5800025 0 0.0% 0 0 0 0 code_forge 729.39 0.227 729.168 110018 0 0.0% 10000 1651670 1651670 0 coercion_boolean 343.00 0.196 342.807 4450023 0 0.0% 0 0 0 0 coercion_concat 237.49 0.224 237.270 2300025 0 0.0% 0 3888890 3888890 39 coercion_nullish 456.13 0.290 455.843 5100032 0 50.0% 1 136 192 192 coercion_tonumber 191.23 0.256 190.973 2600023 0 0.0% 0 0 0 0 coercion_toprimitive 325.44 0.287 325.154 540025 5 0.0% 7530 2234885 4937483 1815 coercion_tostring 504.64 0.274 504.364 4600025 2 0.0% 0 505850 4194316 83 gc_array 785.29 0.249 785.041 4390027 4 100.0% 928 770240 5562672 672 gc_object 202.84 0.216 202.626 1550025 2 100.0% 19161 2606008 4194376 192 gc_string 48.49 0.202 48.291 460025 0 0.0% 0 788890 788890 40 gc_string_long 2866.40 0.191 2866.205 23000025 18 0.0% 0 3139903 4194423 41 ic_cache 66.56 0.334 66.226 574039 0 78.9% 10001 1740160 2051232 2051232 ic_polymorphic 307.72 0.297 307.420 4033387 0 100.0% 3 408 576 576 loop_do_while 297.12 0.226 296.891 3000019 0 0.0% 0 0 0 0 loop_for 1523.07 0.239 1522.832 16000023 0 0.0% 0 0 0 0 loop_for_in 769.82 0.367 769.450 7591739 0 0.0% 1 3626 3626 1184 loop_for_of 305.84 0.330 305.507 3652739 0 99.0% 12001 1857960 1857960 1184 loop_for_of_string 246.07 0.279 245.792 2726339 0 0.0% 3000 466150 466150 132 loop_index 533.00 0.332 532.669 6367739 0 99.0% 1 3960 3960 1184 loop_while 1524.07 0.184 1523.880 16000023 0 0.0% 0 0 0 0 loop_while_index 542.74 0.438 542.305 6667739 0 99.0% 1 3960 3960 1184 map_ops 1180.54 0.337 1180.199 12650027 5 100.0% 2458 423456 4195416 816 math_ops 605.92 0.315 605.605 6500023 0 0.0% 0 0 0 0 mem_array_grow 447.08 0.222 446.860 3800024 0 0.0% 1 160 2097312 2097312 mem_closure_chain 300.93 0.435 300.493 590034 5 0.0% 39541 10973370 11678306 10079778 mem_cross_call_retain 407.05 0.361 406.689 1590032 3 25.0% 38974 10151253 10151253 8693357 mem_map_retain 118.03 0.220 117.809 600021 2 100.0% 20001 6943612 7063172 7063172 mem_object_graph 218.15 0.365 217.785 901110 3 0.0% 34711 6452744 7162144 6291984 mem_set_retain 54.65 0.197 54.454 460021 0 100.0% 20002 3809234 5158474 5158474 mem_string_accum 127.28 0.218 127.064 960020 0 0.0% 1 2744633 3268921 3268921 mem_string_rope 478.02 0.179 477.839 16025 58 0.0% 0 124184000 124184000 124184000 member_compound 397.13 0.368 396.763 4400076 0 100.0% 6 872 1152 1152 object_keys 710.30 0.348 709.956 3740027 5 0.0% 10862 5826106 5877514 416 prop_access 222.40 0.261 222.135 2800036 0 100.0% 1 136 192 192 prop_bracket 197.35 0.239 197.108 2100036 0 100.0% 1 136 192 192 prop_delete 67.17 0.255 66.920 480034 0 50.0% 1 136 192 192 prop_dynamic 97.82 0.237 97.584 1100028 0 100.0% 1 136 192 192 prop_nested 265.22 0.251 264.964 1550025 5 100.0% 26640 3623264 4195528 576 prop_set 269.46 0.224 269.241 3200032 0 100.0% 1 136 192 192 property 135.41 0.302 135.109 111035 0 0.0% 1 231916 231916 32928 set_ops 1027.49 0.267 1027.224 9950027 5 90.9% 2458 422960 4194920 320 string_build 2875.21 0.306 2874.908 16560027 34 0.0% 0 2596190 4194637 122 string_case 257.96 0.318 257.641 1600028 2 0.0% 0 3405712 4194364 0 string_char 380.40 0.256 380.140 3800025 0 0.0% 0 0 0 0 string_concat 208.72 0.363 208.352 1800031 0 0.0% 0 1900000 1900000 38 string_indexof 110.77 0.200 110.574 1100028 0 0.0% 0 0 0 0 string_length 511.72 0.345 511.372 6361939 0 99.0% 1 7750 7750 4974 string_replace 66.48 0.255 66.223 600030 0 0.0% 0 1320000 1320000 66 string_replace_fn 2021.43 0.390 2021.036 64987 33 0.0% 41513 14865775 14865775 13249 string_split 394.00 0.302 393.703 540030 7 0.0% 1115 4066258 7133544 1226 string_substring 149.95 0.282 149.663 1500030 0 0.0% 0 2150000 2150000 43 string_trim 50.59 0.260 50.327 460028 0 0.0% 0 1560000 1560000 0 try_catch_ok 77.48 0.236 77.245 1050023 0 0.0% 0 0 0 0 try_catch_throw 64.46 0.307 64.154 580023 0 0.0% 20000 3440000 3440000 0 typeof_ops 450.12 0.247 449.867 4100023 4 0.0% 7478 1017008 4194512 0 unary_ops 350.63 0.264 350.368 3700023 0 0.0% 0 0 0 0 内存基准用例(mem_*): mem_object_graph 大型对象图留存:15 层满二叉树 32767 节点整体驻留 session 堆 mem_string_accum 字符串累积留存:40000 个互不相同的字符串驻留数组(interner 压力) mem_closure_chain 闭包/upvalue 长链:10000 层闭包各自捕获前层闭包与 payload 驻留 mem_array_grow 数组增缩容量:扩到 200000 元素后截回 1000,观测元素向量容量是否回落(账目按 Vec capacity 计) mem_cross_call_retain 跨调用长存活数据:全局 store 经 30000 次调用累积 30000 条记录 mem_map_retain 原生盒边持有:Map 持 20000 组字符串键 + 对象值 mem_set_retain 原生盒边持有:Set 持 20000 个对象(各带 payload 字符串) mem_string_rope 拼接 rope 链留存:重复二元拼接形成深 Cons 链(账目按逻辑长度计,数值高于实际足迹) 口径:Peak B/Ret B 为 session 堆账目(对象头 + 堆数据 + 存活串);BigInt 不入 该账目,由单 run 分配公式按表长单列。epoch arena 的临时驻留不计入字节账目 (数量列恒零)。Peak B 为顶层指令边界采样的 session 堆账目高水位;单指令内瞬态 与 epoch 高水位不计。Ret B 为 workload 后晋升 + 完整 GC 的真存活集,至多含一份 引擎内部副本:逃逸屏障留 epoch 原件且顶层寄存器根不回写时,测量时晋升会把原件 再克隆一份(object_graph 见留存锚测试)。 A/B 判据口径: 主判(回归门):确定性列——指令数、内存账目(session/peak/retained)、 垃圾回收计数、内联缓存计数——跨运行逐字节一致,零容差,双向任何变化即信号; 基线对比的退出码 1 只认这些列。 次判(墙时间):wall/exec/compile/gc_collection 列在 ±5% 带内(固定核、 warmup 2、三轮中位);基线对比容差 0.50,信息性,不影响退出码。 基线文件是陈旧锚(安静树单次快照),不是 A/B 仪器;A/B 是同机同宿主 严格交错对比。