diff --git a/playwright/cdp.js b/playwright/cdp.js
index 3399f26..fff31cd 100644
--- a/playwright/cdp.js
+++ b/playwright/cdp.js
@@ -33,7 +33,7 @@ let metrics = [];
 console.log("Connection to browser on " + browserAddress);
 const browser = await chromium.connectOverCDP(browserAddress);
 
-for (var run = 1; run<=runs; run++) {
+for (var run = 0; run<runs; run++) {
 
     // measure run time.
     const rstart = process.hrtime.bigint();
diff --git a/puppeteer/cdp.js b/puppeteer/cdp.js
index 7545e60..e5cef34 100644
--- a/puppeteer/cdp.js
+++ b/puppeteer/cdp.js
@@ -35,7 +35,7 @@ let metrics = [];
     browserURL: browserAddress,
   });
 
-  for (var run = 1; run<=runs; run++) {
+  for (var run = 0; run<runs; run++) {
     // measure run time.
     const rstart = process.hrtime.bigint();