faastjs/dist/src/metrics.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.MemoryLeakDetector = exports.FunctionCpuUsage = exports.FunctionStatsMap = exports.FactoryMap = void 0;
const provider_1 = require("./provider");
const shared_1 = require("./shared");
class FactoryMap extends Map {
    constructor(factory) {
        super();
        this.factory = factory;
    }
    getOrCreate(key) {
        let val = this.get(key);
        if (!val) {
            val = this.factory(key);
            this.set(key, val);
        }
        return val;
    }
}
exports.FactoryMap = FactoryMap;
class FunctionStatsMap {
    constructor() {
        this.fIncremental = new FactoryMap(() => new provider_1.FunctionStats());
        this.fAggregate = new FactoryMap(() => new provider_1.FunctionStats());
        this.aggregate = new provider_1.FunctionStats();
    }
    update(fn, key, value) {
        this.fIncremental.getOrCreate(fn)[key].update(value);
        this.fAggregate.getOrCreate(fn)[key].update(value);
        this.aggregate[key].update(value);
    }
    incr(fn, key, n = 1) {
        this.fIncremental.getOrCreate(fn)[key] += n;
        this.fAggregate.getOrCreate(fn)[key] += n;
        this.aggregate[key] += n;
    }
    resetIncremental() {
        this.fIncremental.clear();
    }
    toString() {
        return [...this.fAggregate].map(([key, value]) => `[${key}] ${value}`).join("\n");
    }
    clear() {
        this.fIncremental.clear();
        this.fAggregate.clear();
    }
}
exports.FunctionStatsMap = FunctionStatsMap;
class FunctionCpuUsage {
    constructor() {
        this.utime = new shared_1.Statistics();
        this.stime = new shared_1.Statistics();
        this.cpuTime = new shared_1.Statistics();
        this.smallest = new shared_1.SmallestN(100);
    }
}
exports.FunctionCpuUsage = FunctionCpuUsage;
class FunctionMemoryStats {
    constructor() {
        this.rss = new shared_1.Statistics();
        this.heapTotal = new shared_1.Statistics();
        this.heapUsed = new shared_1.Statistics();
        this.external = new shared_1.Statistics();
    }
}
class FunctionMemoryCounters {
    constructor() {
        this.heapUsedGrowth = 0;
        this.externalGrowth = 0;
    }
}
class MemoryLeakDetector {
    constructor(memorySize) {
        this.instances = new FactoryMap(() => new FunctionMemoryStats());
        this.counters = new FactoryMap(() => new FunctionMemoryCounters());
        this.warned = new Set();
        this.memorySize = memorySize || 100;
    }
    detectedNewLeak(fn, instanceId, memoryUsage) {
        if (this.warned.has(fn)) {
            return false;
        }
        const { rss, heapTotal, heapUsed, external } = memoryUsage;
        const instanceStats = this.instances.getOrCreate(instanceId);
        const counters = this.counters.getOrCreate(instanceId);
        if (heapUsed > instanceStats.heapUsed.max) {
            counters.heapUsedGrowth++;
        }
        else {
            counters.heapUsedGrowth = 0;
        }
        if (external > instanceStats.external.max) {
            counters.externalGrowth++;
        }
        else {
            counters.externalGrowth = 0;
        }
        instanceStats.rss.update(rss);
        instanceStats.heapTotal.update(heapTotal);
        instanceStats.heapUsed.update(heapUsed);
        instanceStats.external.update(external);
        if (heapUsed > this.memorySize * 0.8 * 2 ** 20 ||
            external > this.memorySize * 0.8 * 2 ** 20) {
            if (counters.heapUsedGrowth > 4 || counters.externalGrowth > 4) {
                this.warned.add(fn);
                return true;
            }
        }
        return false;
    }
    clear() {
        this.instances.clear();
        this.counters.clear();
        this.warned.clear();
    }
}
exports.MemoryLeakDetector = MemoryLeakDetector;
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{ FunctionStats } from \"./provider\";\nimport { SmallestN, Statistics } from \"./shared\";\nimport { PropertiesOfType } from \"./types\";\n\nexport class FactoryMap<K = string, V = {}> extends Map<K, V> {\n    constructor(readonly factory: (key: K) => V) {\n        super();\n    }\n\n    getOrCreate(key: K) {\n        let val = this.get(key);\n        if (!val) {\n            val = this.factory(key);\n            this.set(key, val);\n        }\n        return val;\n    }\n}\n\nexport class FunctionStatsMap {\n    fIncremental = new FactoryMap(() => new FunctionStats());\n    fAggregate = new FactoryMap(() => new FunctionStats());\n    aggregate = new FunctionStats();\n\n    update(\n        fn: string,\n        key: keyof PropertiesOfType<FunctionStats, Statistics>,\n        value: number\n    ) {\n        this.fIncremental.getOrCreate(fn)[key].update(value);\n        this.fAggregate.getOrCreate(fn)[key].update(value);\n        this.aggregate[key].update(value);\n    }\n\n    incr(fn: string, key: keyof PropertiesOfType<FunctionStats, number>, n: number = 1) {\n        this.fIncremental.getOrCreate(fn)[key] += n;\n        this.fAggregate.getOrCreate(fn)[key] += n;\n        this.aggregate[key] += n;\n    }\n\n    resetIncremental() {\n        this.fIncremental.clear();\n    }\n\n    toString() {\n        return [...this.fAggregate].map(([key, value]) => `[${key}] ${value}`).join(\"\\n\");\n    }\n\n    clear() {\n        this.fIncremental.clear();\n        this.fAggregate.clear();\n    }\n}\n\nexport class FunctionCpuUsage {\n    utime = new Statistics();\n    stime = new Statistics();\n    cpuTime = new Statistics();\n    smallest = new SmallestN(100);\n}\n\nclass FunctionMemoryStats {\n    rss = new Statistics();\n    heapTotal = new Statistics();\n    heapUsed = new Statistics();\n    external = new Statistics();\n}\n\nclass FunctionMemoryCounters {\n    heapUsedGrowth = 0;\n    externalGrowth = 0;\n}\n\nexport class MemoryLeakDetector {\n    private instances = new FactoryMap(() => new FunctionMemoryStats());\n    private counters = new FactoryMap(() => new FunctionMemoryCounters());\n    private warned = new Set<string>();\n    private memorySize: number;\n\n    constructor(memorySize?: number) {\n        this.memorySize = memorySize || 100;\n    }\n\n    detectedNewLeak(fn: string, instanceId: string, memoryUsage: NodeJS.MemoryUsage) {\n        if (this.warned.has(fn)) {\n            return false;\n        }\n        const { rss, heapTotal, heapUsed, external } = memoryUsage;\n        const instanceStats = this.instances.getOrCreate(instanceId);\n        const counters = this.counters.getOrCreate(instanceId);\n        if (heapUsed > instanceStats.heapUsed.max) {\n            counters.heapUsedGrowth++;\n        } else {\n            counters.heapUsedGrowth = 0;\n        }\n        if (external > instanceStats.external.max) {\n            counters.externalGrowth++;\n        } else {\n            counters.externalGrowth = 0;\n        }\n        instanceStats.rss.update(rss);\n        instanceStats.heapTotal.update(heapTotal);\n        instanceStats.heapUsed.update(heapUsed);\n        instanceStats.external.update(external);\n\n        if (\n            heapUsed > this.memorySize * 0.8 * 2 ** 20 ||\n            external > this.memorySize * 0.8 * 2 ** 20\n        ) {\n            if (counters.heapUsedGrowth > 4 || counters.externalGrowth > 4) {\n                this.warned.add(fn);\n                return true;\n            }\n        }\n        return false;\n    }\n\n    clear() {\n        this.instances.clear();\n        this.counters.clear();\n        this.warned.clear();\n    }\n}\n"]}