%PDF-
%PDF-
Mini Shell
Mini Shell
'use strict';
const assert = require('assert');
const { GCProfiler } = require('v8');
function collectGCProfile({ duration }) {
return new Promise((resolve) => {
const profiler = new GCProfiler();
profiler.start();
setTimeout(() => {
resolve(profiler.stop());
}, duration);
});
}
function checkGCProfile(data) {
assert.ok(data.version > 0);
assert.ok(data.startTime >= 0);
assert.ok(data.endTime >= 0);
assert.ok(Array.isArray(data.statistics));
// If the array is not empty, check it
if (data.statistics.length) {
// Just check the first one
const item = data.statistics[0];
assert.ok(typeof item.gcType === 'string');
assert.ok(item.cost >= 0);
assert.ok(typeof item.beforeGC === 'object');
assert.ok(typeof item.afterGC === 'object');
// The content of beforeGC and afterGC is same, so we just check afterGC
assert.ok(typeof item.afterGC.heapStatistics === 'object');
const heapStatisticsKeys = [
'externalMemory',
'heapSizeLimit',
'mallocedMemory',
'peakMallocedMemory',
'totalAvailableSize',
'totalGlobalHandlesSize',
'totalHeapSize',
'totalHeapSizeExecutable',
'totalPhysicalSize',
'usedGlobalHandlesSize',
'usedHeapSize',
];
heapStatisticsKeys.forEach((key) => {
assert.ok(item.afterGC.heapStatistics[key] >= 0);
});
assert.ok(typeof item.afterGC.heapSpaceStatistics === 'object');
const heapSpaceStatisticsKeys = [
'physicalSpaceSize',
'spaceAvailableSize',
'spaceName',
'spaceSize',
'spaceUsedSize',
];
heapSpaceStatisticsKeys.forEach((key) => {
const value = item.afterGC.heapSpaceStatistics[0][key];
assert.ok(key === 'spaceName' ? typeof value === 'string' : value >= 0);
});
}
}
async function testGCProfiler() {
const data = await collectGCProfile({ duration: 5000 });
checkGCProfile(data);
}
module.exports = {
collectGCProfile,
checkGCProfile,
testGCProfiler,
};
Zerion Mini Shell 1.0