From f3c70ea566c39121c44476b567a975b2e6c9994e Mon Sep 17 00:00:00 2001
From: boris <shuaibo.zhang@hotmail.com>
Date: Sun, 13 Sep 2026 01:12:56 +0800
Subject: [PATCH] docs(perf): record expression context CPU and real HTTP
 parity evidence

---
 ...pression-context-performance-20260913.json | 4870 +++++++++++++++++
 ...expression-context-performance-20260913.md |  109 +
 2 files changed, 4979 insertions(+)
 create mode 100644 docs/evidence/expression-context-performance-20260913.json
 create mode 100644 docs/expression-context-performance-20260913.md

diff --git a/docs/evidence/expression-context-performance-20260913.json b/docs/evidence/expression-context-performance-20260913.json
new file mode 100644
index 0000000..0819edf
--- /dev/null
+++ b/docs/evidence/expression-context-performance-20260913.json
@@ -0,0 +1,4870 @@
+{
+  "schema": "fidc.expression-context-performance-acceptance/v1",
+  "boundary": "one frozen 4.25-year native-factor strategy; real independent and HTTP reruns; not Source-cold or all-strategy/minute/PIT/live acceptance",
+  "records": [
+    {
+      "sample": "control-1",
+      "receipt": {
+        "schema": "fidc.runner-materialization-performance/v1",
+        "request": {
+          "schema": "fidc.runner-materialization-case/v1",
+          "binary": "/srv/fidc/canonical/build/engine-context-control-20260913/release/fidc-backtest-runner",
+          "binary_sha256": "87dc8d65ae398762e908dbc7d2eea8b32a98f237d7d91431db5e809b424bd573",
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+          "strategy_sha256": "1b2125e861ec980089cee89373987963c1fa598d6c0c7a7eb792ee80d30053bb",
+          "runtime": {
+            "end_date": "2025-11-17",
+            "frequency": "1d",
+            "start_date": "2021-08-23",
+            "initial_cash": 10000000.0,
+            "source_table": "strategy_factory_source_lake.daily_source_rows_v1",
+            "signal_symbol": "000852.SH",
+            "benchmark_symbol": "000852.SH",
+            "backtest_data_bundle_id": "bt_bundle_3e0f5ccf328259506941",
+            "backtest_data_bundle_hash": "7155261bae8e5af9cfdaee18b652ea552d49e954715b1aa9fe364141af7a9026"
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+      "schemaVersion": "fidc-backtest-implementation/v1",
+      "serviceBinarySha256": "bf22f58946c3fa495161eb381a400d4e28d7c8d327ee46f5645d83a8308117cf",
+      "serviceCommit": "b5d22ffab16f851eced3028e12fa02627ee4c399",
+      "status": "verified"
+    }
+  },
+  "source": {
+    "commit": "d5b682c6d097",
+    "branch": null,
+    "dirty": false,
+    "git_status": "ok",
+    "git_error": null,
+    "loaded_at": "2026-09-12T03:57:06.665536+00:00",
+    "repo_root": "/srv/fidc/programs/src/alpha-factory-runtime",
+    "server_module": "/srv/fidc/programs/src/alpha-factory-runtime/backend/server.py",
+    "loaded_server_sha256": "ef827ce6b95e0ea63047a0068af2677633716e0a5d63cf350de6c91a3413e352",
+    "filesystem_server_sha256": "ef827ce6b95e0ea63047a0068af2677633716e0a5d63cf350de6c91a3413e352",
+    "filesystem_server_mtime_ns": 1789185385557065788,
+    "current_git_commit": "d5b682c6d097",
+    "current_git_branch": null,
+    "current_git_dirty": false,
+    "current_git_status": "ok",
+    "current_git_error": null,
+    "git_state_stale": false,
+    "source_stale": false,
+    "source_identity_error": null,
+    "runtime_identity_status": "ok",
+    "pid": 1700096,
+    "process_name": "MainProcess",
+    "parent_pid": 2216
+  },
+  "units": {
+    "fidc-backtest-service-highmem177.service": "MainPID=3320588\nNRestarts=0\nMemoryCurrent=8823468032\nMemoryPeak=11476738048\nActiveState=active\n",
+    "fidc-private-source-lake.service": "MainPID=1700096\nNRestarts=0\nMemoryCurrent=16396701696\nMemoryPeak=16577880064\nActiveState=active\n",
+    "fidc-factor-mining-auto.service": "MainPID=0\nNRestarts=0\nMemoryCurrent=[not set]\nMemoryPeak=[not set]\nActiveState=inactive\n"
+  },
+  "tests": {
+    "enginePassed": 780,
+    "engineIgnored": 9,
+    "runnerPassed": 408,
+    "runnerIgnored": 8,
+    "apiPassed": 113,
+    "apiIgnored": 3,
+    "benchmarkScriptPassed": 10
+  },
+  "sourceValidationOutlierRetained": {
+    "sample": "control-1",
+    "seconds": 11.202
+  },
+  "highLoadSamplesRetained": [
+    "control-3",
+    "candidate-3"
+  ],
+  "otherUsersModified": false,
+  "researchOrSignalResumed": false
+}
diff --git a/docs/expression-context-performance-20260913.md b/docs/expression-context-performance-20260913.md
new file mode 100644
index 0000000..ad29b70
--- /dev/null
+++ b/docs/expression-context-performance-20260913.md
@@ -0,0 +1,109 @@
+# 表达式上下文性能验收
+
+## 范围
+
+本轮优化 FIDC 引擎的逐股票表达式上下文，不修改策略、因子值、窗口、时间可见性、
+选股/订单规则、费用、成交价、风控或公司行为。Source 保持 `d5b682c6d097`，
+研究和信号保持暂停。其他用户任务只读观察，不更改其进程、亲和性或配置。
+
+已完成编译、回归、正式回放与177发布验收，不能据此关闭整个目标。
+
+## 重复开销
+
+1. DataSet 已采用 `NumericFactorMap`，但 `StockExpressionState` 仍把数值因子
+   重建为 `BTreeMap<String, f64>`，增加树节点和字符串分配。
+2. 每日可用因子名集合先为每个证券复制名称，再由集合丢弃重复名称。
+
+候选在表达式上下文延续紧凑数值存储。每日名称仍按当日真实字段生成完整集合，
+仅改为先对借用名称去重，再为唯一名称分配字符串；文本因子同理。
+没有用全局/未来日期目录替代当日字段，没有缓存选股结果或账户状态。
+Rhai `factors[...]`、缺失、NaN、负零、别名、覆盖顺序与已完成交易日可见性保持原行为。
+
+## CPU 计时
+
+Runner 新增以下运行计时，HTTP benchmark 同样保留：
+
+- `engineTaskWallSeconds`：实际引擎同步任务的墙钟耗时，包含其同步数据读取等待。
+- `engineThreadCpuSeconds`：Linux `CLOCK_THREAD_CPUTIME_ID` 实测的引擎调用线程CPU时间。
+  不包含其他并行线程、I/O等待或未被调度的时间；不可当作整个进程总CPU时间。
+  读取不可用、跨线程或时钟异常保持null，不填0。
+- `engineTaskCount`：实际执行引擎的次数，包含原有修复循环的重放。
+
+这些是 `engineSeconds` 的子指标，禁止再次加到总耗时。正常耗时与诊断运行分开保存。
+计时不改写历史制品，旧记录缺少该指标时保持未知。
+
+## 验收设置
+
+- 固定引擎基线 `fe7243b`；候选为177的 `07b7b18`，对应本地 `df1862e`。
+- 两边使用同一计时版service `a9df11a`；`b5d22ff`仅补充benchmark字段读取。
+- 2021-08-23至2025-11-17、初始1000万、原冻结runtime与策略，1025个执行交易日。
+- 保留原 `session_capacity_audit`，不能当作实际开盘流动性验证。
+- 官方benchmark入口、Boris执行、同CPU资源与Source版本、新进程、相同数据缓存副本、
+  新结果目录，不复用回测结果。
+- 引擎780项、runner408项、API113项、脚本10项通过；9/8/3项手动或外部环境用例分别忽略。
+- 专项延伸验证紧凑因子的克隆、Rhai映射暴露、缺失、NaN及负零；CPU计时验证睡眠和跨线程边界。
+
+证据根：`/srv/fidc/canonical/run/research/engine-context-20260913`。
+
+## 独立进程对照
+
+| 次序 | 样本 | 完整墙钟 | Source校验 | 数据准备 | 引擎墙钟 | 引擎线程CPU |
+|---|---|---:|---:|---:|---:|---:|
+| 1 | control-1 | 31.234s | 11.202s | 8.393s | 10.461s | 10.458s |
+| 2 | candidate-1 | 17.002s | 0.004s | 8.404s | 7.406s | 7.404s |
+| 3 | candidate-2 | 18.203s | 0.003s | 8.371s | 7.411s | 7.408s |
+| 4 | control-2 | 22.983s | 0.004s | 8.323s | 13.401s | 13.398s |
+| 5 | control-3 | 30.714s | 0.005s | 15.318s | 13.999s | 13.990s |
+| 6 | candidate-3 | 25.336s | 0.005s | 13.524s | 10.471s | 10.468s |
+
+首个基线的Source校验等待原样保留，不事后改称预热，不把11.202秒归因于引擎改动。
+后段样本出现主机负载/缓存竞争变化，数据准备也变慢，不能直接用全组平均墙钟夸大提速。
+相邻低负载对照的引擎线程CPU为10.458至7.404秒，后段为13.990至10.468秒。
+CPU计时与任务墙钟非常接近，证明样本主要在执行CPU工作，而不是等待HTTP；
+这不代表没有SMT、内存带宽或其他用户CPU竞争。
+
+六次均为21,393笔成交，账户、权益、委托、成交、持仓和风控canonical及结果制品完全一致。
+每份63个数据缓存文件经完整SHA核对相同，没有复制或读取旧回测结果。
+
+## HTTP 对照
+
+| 状态 | 版本 | 运行ID | 总耗时 | 引擎耗时 |
+|---|---|---|---:|---:|
+| 清DataSet，磁盘/Source保持 | 原版 | btr_1789232559582_3166774_4 | 21.987s | 11.328s |
+| 清DataSet，磁盘/Source保持 | 原版 | btr_1789232585690_3166774_5 | 21.684s | 11.259s |
+| 复用DataSet | 原版 | btr_1789232669598_3166774_6 | 11.820s | 11.031s |
+| 复用DataSet | 原版 | btr_1789232684861_3166774_7 | 11.857s | 11.067s |
+| 清DataSet，磁盘/Source保持 | 新版 | btr_1789232818009_3320588_0 | 17.296s | 7.537s |
+| 清DataSet，磁盘/Source保持 | 新版 | btr_1789232839269_3320588_1 | 17.413s | 7.627s |
+| 复用DataSet | 新版 | btr_1789232898983_3320588_2 | 8.549s | 7.738s |
+| 复用DataSet | 新版 | btr_1789232910904_3320588_3 | 8.586s | 7.784s |
+
+同状态HTTP均值：重建DataSet从21.836至17.355秒，减少约20.5%；
+复用DataSet从11.839至8.568秒，减少约27.6%。两种状态分开比较，
+没有把8.568秒当作Source冷启动成绩。与上一轮不同时间的15/17秒样本不作直接百分比对比。
+
+原版API没有线程CPU字段，保持null；新版本每次实际执行引擎一次，
+两次重建的线程CPU为7.535/7.624秒。没有用新版本计时回填旧记录。
+八次HTTP和六次独立回放的canonical及结果制品SHA全部相同，终态审计clean。
+
+## 发布状态
+
+177通过官方安装器发布 engine `07b7b181b60138c6ef1c965543c0e3192ac65903`、
+service `b5d22ffab16f851eced3028e12fa02627ee4c399`。
+运行身份 `fdd8652a47a5935be4d891beb3b8b0f3e19a468be166a902a2a97b85a9c9e01e`。
+
+- API SHA：`bf22f58946c3fa495161eb381a400d4e28d7c8d327ee46f5645d83a8308117cf`。
+- Runner SHA：`7b3849cd8af33d650db242add80c49cfdd32e8cc8686a614da7b3b4016ce2a60`。
+- 生产在用构建根：`/srv/fidc/canonical/build/engine-context-candidate-20260913`，禁止清理。
+- 原生因子能力目录发布前后字节相同，SHA为
+  `cec37331a476bc39bdea32c308581b8ac2f86d005d8dd4cc7ba228c5d9dc9a2e`。
+- API PID3320588，Boris、active、NRestarts=0；Source仍为PID1700096/d5，研究未恢复。
+
+[完整结构化验收证据](evidence/expression-context-performance-20260913.json)，
+SHA256 `f526950e018354c1305922beebf4063ae3823004f8c5ab20510a452f98b7b7ea`。
+
+## 边界
+
+本轮真实长区间案例含一个原生扩展因子，动态映射、缺失及多字段语义另由引擎回归覆盖；
+不宣称所有策略都具有相同比例提速。Source冷路径仍受独立冻结约束，
+信号闭环和全部策略/分钟区间/财务PIT不在本轮通过范围内。