perf: optimize app startup and background lifecycles

electron/main/gpu-fallback.ts

@@ -0,0 +1,65 @@
+import { mkdirSync, readFileSync, renameSync, writeFileSync } from 'node:fs';
+import { dirname } from 'node:path';
+
+export const GPU_CRASH_WINDOW_MS = 10 * 60 * 1000;
+export const GPU_CRASH_THRESHOLD = 2;
+
+export type GpuFallbackState = {
+  crashCount: number;
+  lastCrashAt: number;
+  reason: string;
+};
+
+function isState(value: unknown): value is GpuFallbackState {
+  if (!value || typeof value !== 'object') return false;
+  const record = value as Record<string, unknown>;
+  return Number.isFinite(record.crashCount)
+    && Number.isFinite(record.lastCrashAt)
+    && typeof record.reason === 'string';
+}
+
+export function readGpuFallbackState(
+  filePath: string,
+  now = Date.now(),
+): GpuFallbackState | null {
+  try {
+    const parsed: unknown = JSON.parse(readFileSync(filePath, 'utf8'));
+    if (!isState(parsed)) return null;
+    if (now - parsed.lastCrashAt > GPU_CRASH_WINDOW_MS) return null;
+    return parsed;
+  } catch {
+    return null;
+  }
+}
+
+export function shouldUseSoftwareRendering(input: {
+  envDisabled?: boolean;
+  cliDisabled?: boolean;
+  state?: GpuFallbackState | null;
+  now?: number;
+}): boolean {
+  if (input.envDisabled || input.cliDisabled) return true;
+  const state = input.state;
+  if (!state) return false;
+  const now = input.now ?? Date.now();
+  return now - state.lastCrashAt <= GPU_CRASH_WINDOW_MS
+    && state.crashCount >= GPU_CRASH_THRESHOLD;
+}
+
+export function recordGpuCrash(
+  filePath: string,
+  reason: string,
+  now = Date.now(),
+): GpuFallbackState {
+  const previous = readGpuFallbackState(filePath, now);
+  const next: GpuFallbackState = {
+    crashCount: previous ? previous.crashCount + 1 : 1,
+    lastCrashAt: now,
+    reason,
+  };
+  mkdirSync(dirname(filePath), { recursive: true });
+  const temporaryPath = `${filePath}.${process.pid}.tmp`;
+  writeFileSync(temporaryPath, `${JSON.stringify(next)}\n`, 'utf8');
+  renameSync(temporaryPath, filePath);
+  return next;
+}