perf(shared): optimize hot-path utilities across plugin

- task-list: replace O(n³) blocker resolution with Map lookup (C4)
- logger: buffer log entries and flush periodically to reduce sync I/O (C5)
- plugin-interface: create chatParamsHandler once at init (H3)
- pattern-matcher: cache compiled RegExp for wildcard matchers (H6)
- file-reference-resolver: use replaceAll instead of split/join (M9)
- connected-providers-cache: add in-memory cache for read operations (L4)

src/plugin-interface.ts

@@ -32,10 +32,7 @@ export function createPluginInterface(args: {
   return {
     tool: tools,
 
-    "chat.params": async (input: unknown, output: unknown) => {
+    "chat.params": createChatParamsHandler({ anthropicEffort: hooks.anthropicEffort }),
-      const handler = createChatParamsHandler({ anthropicEffort: hooks.anthropicEffort })
-      await handler(input, output)
-    },
 
     "chat.headers": createChatHeadersHandler({ ctx }),
 

src/shared/connected-providers-cache.ts

@@ -32,6 +32,9 @@ export function createConnectedProvidersCacheStore(
 		return join(getCacheDir(), filename)
 	}
 
+	let memConnected: string[] | null | undefined
+	let memProviderModels: ProviderModelsCache | null | undefined
+
 	function ensureCacheDir(): void {
 		const cacheDir = getCacheDir()
 		if (!existsSync(cacheDir)) {
@@ -40,10 +43,12 @@ export function createConnectedProvidersCacheStore(
 	}
 
 	function readConnectedProvidersCache(): string[] | null {
+		if (memConnected !== undefined) return memConnected
 		const cacheFile = getCacheFilePath(CONNECTED_PROVIDERS_CACHE_FILE)
 
 		if (!existsSync(cacheFile)) {
 			log("[connected-providers-cache] Cache file not found", { cacheFile })
+			memConnected = null
 			return null
 		}
 
@@ -51,9 +56,11 @@ export function createConnectedProvidersCacheStore(
 			const content = readFileSync(cacheFile, "utf-8")
 			const data = JSON.parse(content) as ConnectedProvidersCache
 			log("[connected-providers-cache] Read cache", { count: data.connected.length, updatedAt: data.updatedAt })
+			memConnected = data.connected
 			return data.connected
 		} catch (err) {
 			log("[connected-providers-cache] Error reading cache", { error: String(err) })
+			memConnected = null
 			return null
 		}
 	}
@@ -74,6 +81,7 @@ export function createConnectedProvidersCacheStore(
 
 		try {
 			writeFileSync(cacheFile, JSON.stringify(data, null, 2))
+			memConnected = connected
 			log("[connected-providers-cache] Cache written", { count: connected.length })
 		} catch (err) {
 			log("[connected-providers-cache] Error writing cache", { error: String(err) })
@@ -81,10 +89,12 @@ export function createConnectedProvidersCacheStore(
 	}
 
 	function readProviderModelsCache(): ProviderModelsCache | null {
+		if (memProviderModels !== undefined) return memProviderModels
 		const cacheFile = getCacheFilePath(PROVIDER_MODELS_CACHE_FILE)
 
 		if (!existsSync(cacheFile)) {
 			log("[connected-providers-cache] Provider-models cache file not found", { cacheFile })
+			memProviderModels = null
 			return null
 		}
 
@@ -95,9 +105,11 @@ export function createConnectedProvidersCacheStore(
 				providerCount: Object.keys(data.models).length,
 				updatedAt: data.updatedAt,
 			})
+			memProviderModels = data
 			return data
 		} catch (err) {
 			log("[connected-providers-cache] Error reading provider-models cache", { error: String(err) })
+			memProviderModels = null
 			return null
 		}
 	}
@@ -118,6 +130,7 @@ export function createConnectedProvidersCacheStore(
 
 		try {
 			writeFileSync(cacheFile, JSON.stringify(cacheData, null, 2))
+			memProviderModels = cacheData
 			log("[connected-providers-cache] Provider-models cache written", {
 				providerCount: Object.keys(data.models).length,
 			})

src/shared/file-reference-resolver.ts

@@ -74,7 +74,7 @@ export async function resolveFileReferencesInText(
 
   let resolved = text
   for (const [pattern, replacement] of replacements.entries()) {
-    resolved = resolved.split(pattern).join(replacement)
+    resolved = resolved.replaceAll(pattern, replacement)
   }
 
   if (findFileReferences(resolved).length > 0 && depth + 1 < maxDepth) {

src/shared/logger.ts

@@ -1,16 +1,42 @@
-// Shared logging utility for the plugin
-
 import * as fs from "fs"
 import * as os from "os"
 import * as path from "path"
 
 const logFile = path.join(os.tmpdir(), "oh-my-opencode.log")
 
+let buffer: string[] = []
+let flushTimer: ReturnType<typeof setTimeout> | null = null
+const FLUSH_INTERVAL_MS = 500
+const BUFFER_SIZE_LIMIT = 50
+
+function flush(): void {
+  if (buffer.length === 0) return
+  const data = buffer.join("")
+  buffer = []
+  try {
+    fs.appendFileSync(logFile, data)
+  } catch {
+  }
+}
+
+function scheduleFlush(): void {
+  if (flushTimer) return
+  flushTimer = setTimeout(() => {
+    flushTimer = null
+    flush()
+  }, FLUSH_INTERVAL_MS)
+}
+
 export function log(message: string, data?: unknown): void {
   try {
     const timestamp = new Date().toISOString()
     const logEntry = `[${timestamp}] ${message} ${data ? JSON.stringify(data) : ""}\n`
-    fs.appendFileSync(logFile, logEntry)
+    buffer.push(logEntry)
+    if (buffer.length >= BUFFER_SIZE_LIMIT) {
+      flush()
+    } else {
+      scheduleFlush()
+    }
   } catch {
   }
 }

src/shared/pattern-matcher.ts

@@ -9,6 +9,8 @@ function escapeRegexExceptAsterisk(str: string): string {
   return str.replace(/[.+?^${}()|[\]\\]/g, "\\$&")
 }
 
+const regexCache = new Map<string, RegExp>()
+
 export function matchesToolMatcher(toolName: string, matcher: string): boolean {
   if (!matcher) {
     return true
@@ -17,8 +19,12 @@ export function matchesToolMatcher(toolName: string, matcher: string): boolean {
   return patterns.some((p) => {
     if (p.includes("*")) {
       // First escape regex special chars (except *), then convert * to .*
-      const escaped = escapeRegexExceptAsterisk(p)
+      let regex = regexCache.get(p)
-      const regex = new RegExp(`^${escaped.replace(/\*/g, ".*")}$`, "i")
+      if (!regex) {
+        const escaped = escapeRegexExceptAsterisk(p)
+        regex = new RegExp(`^${escaped.replace(/\*/g, ".*")}$`, "i")
+        regexCache.set(p, regex)
+      }
       return regex.test(toolName)
     }
     return p.toLowerCase() === toolName.toLowerCase()

src/tools/task/task-list.ts

@@ -45,6 +45,8 @@ Returns summary format: id, subject, status, owner, blockedBy (not full descript
         }
       }
 
+      const taskMap = new Map(allTasks.map((t) => [t.id, t]))
+
       // Filter out completed and deleted tasks
       const activeTasks = allTasks.filter(
         (task) => task.status !== "completed" && task.status !== "deleted"
@@ -54,7 +56,7 @@ Returns summary format: id, subject, status, owner, blockedBy (not full descript
       const summaries: TaskSummary[] = activeTasks.map((task) => {
         // Filter blockedBy to only include unresolved (non-completed) blockers
         const unresolvedBlockers = task.blockedBy.filter((blockerId) => {
-          const blockerTask = allTasks.find((t) => t.id === blockerId)
+          const blockerTask = taskMap.get(blockerId)
           // Include if blocker doesn't exist (missing) or if it's not completed
           return !blockerTask || blockerTask.status !== "completed"
         })