@beincom/node-profile/dist/profilers/pyroscope-profiler.js

``` npm install @beincom/node-profile # yarn add @beincom/node-profile ```

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.PyroscopeProfiler = void 0;
const continuous_profiler_1 = require("./continuous-profiler");
const heap_profiler_1 = require("./heap-profiler");
const exporters_1 = require("../exporters");
const wall_profiler_1 = require("./wall-profiler");
const MICROS_PER_SECOND = 1e6;
const MS_PER_SECOND = 1e3;
const B_PER_MB = 1024;
const DEFAULT_FLUSH_DURATION_MS = 60000;
const DEFAULT_SAMPLING_DURATION_SECONDS = 60;
const DEFAULT_SAMPLING_DURATION_MS = MS_PER_SECOND * DEFAULT_SAMPLING_DURATION_SECONDS;
const DEFAULT_SAMPLING_HZ = 100;
const DEFAULT_SAMPLING_INTERVAL_MICROS = MICROS_PER_SECOND / DEFAULT_SAMPLING_HZ;
const DEFAULT_SAMPLING_INTERVAL_MB = 512;
const DEFAULT_SAMPLING_INTERVAL_BYTES = B_PER_MB * DEFAULT_SAMPLING_INTERVAL_MB;
const DEFAULT_STACK_DEPTH = 64;
const DEFAULT_APP_NAME = '';
const DEFAULT_SERVER_ADDRESS = 'http://localhost:4040';
class PyroscopeProfiler {
    constructor(config) {
        const exporter = this.initializePyroscopeApiExporter(config);
        this.heapProfiler = this.initializeHeapProfiler(config, exporter);
        this.wallProfiler = this.initializeWallProfiler(config, exporter);
    }
    buildApplicationName(config) {
        const appName = config.appName ?? DEFAULT_APP_NAME;
        const tagsStringified = Object.entries(config.tags ?? {})
            .map(([tagKey, tagValue]) => `${tagKey}=${tagValue}`)
            .join(',');
        return `${appName}{${tagsStringified}}`;
    }
    calculateFlushIntervalMs(config) {
        return config.flushIntervalMs ?? DEFAULT_FLUSH_DURATION_MS;
    }
    initializePyroscopeApiExporter(config) {
        return new exporters_1.PyroscopeApiExporter(this.buildApplicationName(config), config.authToken, config.serverAddress ?? DEFAULT_SERVER_ADDRESS, config);
    }
    initializeHeapProfiler(config, exporter) {
        const flushIntervalMs = this.calculateFlushIntervalMs(config);
        return new continuous_profiler_1.ContinuousProfiler({
            exporter,
            flushIntervalMs: flushIntervalMs,
            profiler: new heap_profiler_1.HeapProfiler(),
            startArgs: {
                samplingIntervalBytes: config.heap?.samplingIntervalBytes ?? DEFAULT_SAMPLING_INTERVAL_BYTES,
                stackDepth: config.heap?.stackDepth ?? DEFAULT_STACK_DEPTH,
            },
        });
    }
    initializeWallProfiler(config, exporter) {
        const flushIntervalMs = this.calculateFlushIntervalMs(config);
        return new continuous_profiler_1.ContinuousProfiler({
            exporter,
            flushIntervalMs: flushIntervalMs,
            profiler: new wall_profiler_1.WallProfiler(),
            startArgs: {
                sourceMapper: config.sourceMapper,
                samplingDurationMs: config.wall?.samplingDurationMs ?? DEFAULT_SAMPLING_DURATION_MS,
                samplingIntervalMicros: config.wall?.samplingIntervalMicros ??
                    DEFAULT_SAMPLING_INTERVAL_MICROS,
            },
        });
    }
}
exports.PyroscopeProfiler = PyroscopeProfiler;
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