javascript - 记录执行异步等待功能所花费的时间

Question

我如何知道这个函数执行需要多少时间？

export async function queryElasticSearch(userQuery, index) {
    if (_.isEmpty(userQuery)) {
        throw new Error('User query is empty or null');
    }
    try {
        const elasticSearchRequestBody = getElasticSearchRequestBody(index, userQuery);
        return await elasticSearchClient.search(elasticSearchRequestBody);
    } catch (err) {
        throw err;
    }
}

Answer 1

像这样:

export async function queryElasticSearch(userQuery, index) {
  const start = Date.now()
  try {
    if (_.isEmpty(userQuery)) throw new Error('User query is empty or null');
    const elasticSearchRequestBody = getElasticSearchRequestBody(index, userQuery);
    return await elasticSearchClient.search(elasticSearchRequestBody);
  } finally {
    console.log(Date.now() - start)
  }
}

或者，如果您想要以微秒为单位的精度，您可以使用 performance.now()...

编辑:最终根据 Bergi 的建议添加。