import { performance } from 'node:perf_hooks';
import { log } from '../utils/logger.ts';
const PROFILE_ENV = 'XCODEBUILDMCP_STARTUP_PROFILE';
function isEnabled(): boolean {
const value = process.env[PROFILE_ENV]?.toLowerCase();
return value === '1' || value === 'true';
}
export interface StartupProfiler {
readonly enabled: boolean;
readonly startedAtMs: number;
mark(stage: string, startedAtMs: number): void;
}
export function createStartupProfiler(scope: string): StartupProfiler {
const enabled = isEnabled();
const startedAtMs = performance.now();
return {
enabled,
startedAtMs,
mark(stage: string, stageStartedAtMs: number): void {
if (!enabled) return;
const elapsedMs = performance.now() - stageStartedAtMs;
const totalMs = performance.now() - startedAtMs;
log(
'info',
`[startup-profile] scope=${scope} stage=${stage} ms=${elapsedMs.toFixed(1)} totalMs=${totalMs.toFixed(1)}`,
);
},
};
}
export function getStartupProfileNowMs(): number {
return performance.now();
}
