tokland

const puppeteer = require('puppeteer');

const escapeXpathString = str => {
  const splitedQuotes = str.replace(/'/g, `', "'", '`);
  return `concat('${splitedQuotes}', '')`;
};

const clickByText = async (page, text) => {
  const escapedText = escapeXpathString(text);
  const linkHandlers = await page.$x(`//a[contains(text(), ${escapedText})]`);

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD