perf_hooks.importHistogram(data)

• data <Uint8Array> 一个之前由 histogram.export() 生成的 CBOR 编码直方图。
• 返回：<RecordableHistogram>

从 CBOR 编码的 Uint8Array 重建直方图。返回的直方图是一个完整的 <RecordableHistogram>，包含所有桶数据、配置和 EWMA 状态。可以向其中记录新值。

🌐 Reconstructs a histogram from a CBOR-encoded Uint8Array. The returned histogram is a full <RecordableHistogram> with all bucket data, configuration, and EWMA state restored. New values can be recorded into it.

histogram.export() 生成的任何格式版本的数据都可以导入。详情请参见 直方图导出格式兼容性。

🌐 Data in any format version produced by histogram.export() can be imported. See histogram export format compatibility for details.

const { createHistogram, importHistogram } = require('node:perf_hooks');

const h = createHistogram();
for (let i = 1; i <= 1000; i++) h.record(i);

// Serialize and reconstruct
const data = h.export();
const h2 = importHistogram(data);

console.log(h2.count);          // 1000
console.log(h2.percentile(99)); // Same as h.percentile(99) 拷贝