一条 JS 主线程同时扛 HTTP 控制面与 agent loop，而进程巡检每次枚举整张 /proc 表：共享宿主上可把主线程钉死数小时

--- a/index.js
+++ b/index.js
@@ -1,3 +1,30 @@
+/* dsh-inspector-counters: env-gated (DSH_INSPECTOR_COUNTERS=1) */
+import __dshFs from "node:fs";
+const __dshCnt = (globalThis.__dshInspectorCounters ??= (() => {
+  const on = process.env.DSH_INSPECTOR_COUNTERS === "1";
+  const rows = new Map();
+  const t = (label, fn) => {
+    if (!on) return fn();
+    const s = process.hrtime.bigint();
+    try { return fn(); } finally {
+      const r = rows.get(label) ?? { c: 0, ms: 0 };
+      r.c += 1; r.ms += Number(process.hrtime.bigint() - s) / 1e6; rows.set(label, r);
+    }
+  };
+  if (on) {
+    const timer = setInterval(() => {
+      let pids = -1;
+      try { pids = __dshFs.readdirSync("/proc").length; } catch (_e) { pids = -1; }
+      for (const [k, v] of rows) {
+        process.stderr.write("dsh_inspector label=" + k + " calls=" + v.c + " ms=" + v.ms.toFixed(1) +
+          " pids=" + pids + " at=" + new Date().toISOString() + "\n");
+      }
+    }, 60000);
+    timer.unref?.();
+  }
+  return { t };
+})());
+
 import { C as bindManagedProcess, D as createProcessInspector, E as validateSubprocessSpec, O as controlPipe, S as loadLinuxExecve, T as spawnSubprocess, _ as parseWindowsRunnerResult, c as runnerStdio, d as cleanupLinuxLaunchFiles, l as spawnRunnerInvocation, m as deserializeRunnerError, n as WINDOWS_RUNNER_SELECTION, o as runnerEnvironment, p as createLinuxLaunchFiles, s as runnerInvocationAvailable, u as targetEnvironment, w as childEnv, y as readLinuxStartupError } from "./runner-launch-B2zsQ1Dz.js";
 import { logSpillFailure, prepareManagedProcessBinding } from "./output.js";
 import { closeSync, constants, existsSync, mkdtempSync, openSync, readFileSync, rmSync, statSync, writeFileSync } from "node:fs";
@@ -960,7 +987,7 @@
 		this.observeShellExit = observeShellExit;
 		this.pid = terminal.pid;
 		try {
-			this.rootIdentity = inspector.snapshot().tree(this.pid).find((member) => member.pid === this.pid);
+			this.rootIdentity = __dshCnt.t("construct", () => inspector.snapshot()).tree(this.pid).find((member) => member.pid === this.pid);
 		} catch (_rootIdentityUnavailable) {
 			this.rootIdentity = void 0;
 		}
@@ -1012,7 +1039,7 @@
 		this.terminal.resize(cols, rows);
 	}
 	async inspectForeground() {
-		this.descendants(this.inspector.snapshot());
+		this.descendants(__dshCnt.t("inspectForeground", () => this.inspector.snapshot()));
 		const processGroupId = this.inspector.foregroundPgid(this.pid);
 		if (processGroupId === void 0) return void 0;
 		return {
@@ -1029,7 +1056,7 @@
 				revision: 0
 			};
 			revision = shell.revision;
-			const observed = this.inspector.snapshot();
+			const observed = __dshCnt.t("inspectActivity", () => this.inspector.snapshot());
 			const descendants = this.descendants(observed);
 			const root = observed.tree(this.pid).find((member) => member.pid === this.pid);
 			if (this.exited && this.managedRangeEmpty) state = "idle";
@@ -1123,10 +1150,10 @@
 	async waitForMembers(members) {
 		if (members.length === 0) return [];
 		const until = Date.now() + this.graceMs;
-		let survivors = this.survivors(members, this.inspector.snapshot());
+		let survivors = this.survivors(members, __dshCnt.t("waitForMembers", () => this.inspector.snapshot()));
 		while (survivors.length > 0 && Date.now() < until) {
 			await delay(Math.min(25, Math.max(1, until - Date.now())));
-			survivors = this.survivors(members, this.inspector.snapshot());
+			survivors = this.survivors(members, __dshCnt.t("waitForMembers", () => this.inspector.snapshot()));
 		}
 		return survivors;
 	}
@@ -1138,7 +1165,7 @@
 	forceStopDescendants() {
 		let members = this.trackedDescendants;
 		try {
-			members = this.descendants(this.inspector.snapshot());
+			members = this.descendants(__dshCnt.t("forceStopDescendants", () => this.inspector.snapshot()));
 		} catch (_processTableUnavailableDuringHostExit) {}
 		this.signalMembers(members, "SIGKILL");
 	}
@@ -1154,13 +1181,13 @@
 		return members;
 	}
 	async stopDescendants() {
-		const captured = this.descendants(this.inspector.snapshot());
+		const captured = this.descendants(__dshCnt.t("stopDescendants", () => this.inspector.snapshot()));
 		this.signalMembers(captured, "SIGTERM");
 		const capturedSurvivors = await this.waitForMembers(captured);
-		const members = this.unionMembers(capturedSurvivors, this.descendants(this.inspector.snapshot()));
+		const members = this.unionMembers(capturedSurvivors, this.descendants(__dshCnt.t("stopDescendants", () => this.inspector.snapshot())));
 		this.signalMembers(members, "SIGKILL");
 		const survivors = await this.waitForMembers(members);
-		const observed = this.inspector.snapshot();
+		const observed = __dshCnt.t("stopDescendants", () => this.inspector.snapshot());
 		return this.survivors(this.unionMembers(survivors, this.descendants(observed)), observed);
 	}
 	async stopShell() {

--- a/runner-launch-B2zsQ1Dz.js
+++ b/runner-launch-B2zsQ1Dz.js
@@ -1,3 +1,30 @@
+/* dsh-inspector-counters: env-gated (DSH_INSPECTOR_COUNTERS=1) */
+import __dshFs from "node:fs";
+const __dshCnt = (globalThis.__dshInspectorCounters ??= (() => {
+  const on = process.env.DSH_INSPECTOR_COUNTERS === "1";
+  const rows = new Map();
+  const t = (label, fn) => {
+    if (!on) return fn();
+    const s = process.hrtime.bigint();
+    try { return fn(); } finally {
+      const r = rows.get(label) ?? { c: 0, ms: 0 };
+      r.c += 1; r.ms += Number(process.hrtime.bigint() - s) / 1e6; rows.set(label, r);
+    }
+  };
+  if (on) {
+    const timer = setInterval(() => {
+      let pids = -1;
+      try { pids = __dshFs.readdirSync("/proc").length; } catch (_e) { pids = -1; }
+      for (const [k, v] of rows) {
+        process.stderr.write("dsh_inspector label=" + k + " calls=" + v.c + " ms=" + v.ms.toFixed(1) +
+          " pids=" + pids + " at=" + new Date().toISOString() + "\n");
+      }
+    }, 60000);
+    timer.unref?.();
+  }
+  return { t };
+})());
+
 import { OutputCollector, prepareManagedProcessBinding } from "./output.js";
 import { accessSync, chmodSync, closeSync, constants, existsSync, lstatSync, mkdtempSync, openSync, readFileSync, readSync, readdirSync, readlinkSync, rmdirSync, statSync, unlinkSync, writeFileSync } from "node:fs";
 import { tmpdir } from "node:os";
@@ -1039,7 +1066,7 @@
 	});
 	const direct = directChildResult(child);
 	const pid = child.pid;
-	const owner = fallbackOwner(platform, pid, child, internals.taskkill ?? taskkillProcessTree, internals.linuxProcessGroupHasLiveMembers ?? linuxProcessGroupHasLiveMembers, direct);
+	const owner = fallbackOwner(platform, pid, child, internals.taskkill ?? taskkillProcessTree, internals.linuxProcessGroupHasLiveMembers ?? ((pgid) => __dshCnt.t("groupLiveness", () => linuxProcessGroupHasLiveMembers(pgid))), direct);
 	return bindManagedProcess(spec, {
 		stdin: child.stdin,
 		stdout: child.stdout,