update README instruction for playwright bench

Author: krichprollsch

README.md

@@ -169,11 +169,11 @@ The `playwright/cdp.js` benchmark accepts multiple env vars to be configured.
 * `BASE_URL` is the base url of the running web reser to request, by default `http://127.0.0.1:1234`.
 * `RUNS` is the number of pages loaded by the benchmark, default is `100`.
 
-`npm run bench-cdp` starts a playwright process
+`npm run bench-playwright-cdp` starts a playwright process
 instance and load the page to extract data 100 times.
 
 ```console
-$ npm run bench-cdp
+$ npm run bench-playwright-cdp
 ```
 
 ### Results
@@ -189,9 +189,9 @@ $ google-chrome --headless=new --disable-gpu --remote-debugging-port=9222
 
 Then you can run the benchmark.
 ```console
-$ npm run bench-cdp
+$ npm run bench-playwright-cdp
 
-> [email protected] bench-chrome
+> [email protected] bench-playwright-cdp
 > node playwright/chrome.js
 
 ................................................................................

puppeteer/cdp.js

@@ -24,7 +24,7 @@ const baseURL = process.env.BASE_URL ? process.env.BASE_URL : 'http://127.0.0.1:
 // runs
 const runs = process.env.RUNS ? parseInt(process.env.RUNS) : 100;
 
-const executablePath = process.env.CHROME_PATH;
+const executablePath = process.env.CHROME_PATH ? process.env.CHROME_PATH : '/usr/bin/google-chrome';
 
 // measure general time.
 const gstart = process.hrtime.bigint();