From b4fbe5240481ed4ab5ee93d5d1202f9cd7ec982d Mon Sep 17 00:00:00 2001
From: Connor Clark <cjamcl@google.com>
Date: Mon, 11 Mar 2024 12:48:48 -0700
Subject: [PATCH] core(full-page-screenshot): emit screenshot commands in
 parallel

---
 core/gather/gatherers/full-page-screenshot.js | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/core/gather/gatherers/full-page-screenshot.js b/core/gather/gatherers/full-page-screenshot.js
index 31c4f34faa1d..37dbd47f1972 100644
--- a/core/gather/gatherers/full-page-screenshot.js
+++ b/core/gather/gatherers/full-page-screenshot.js
@@ -119,11 +119,13 @@ class FullPageScreenshot extends BaseGatherer {
    * @return {Promise<LH.Result.FullPageScreenshot['screenshot']>}
    */
   async _takeScreenshot(context) {
-    const metrics = await context.driver.defaultSession.sendCommand('Page.getLayoutMetrics');
-    const result = await context.driver.defaultSession.sendCommand('Page.captureScreenshot', {
-      format: FULL_PAGE_SCREENSHOT_FORMAT,
-      quality: FULL_PAGE_SCREENSHOT_QUALITY,
-    });
+    const [metrics, result] = await Promise.all([
+      context.driver.defaultSession.sendCommand('Page.getLayoutMetrics'),
+      context.driver.defaultSession.sendCommand('Page.captureScreenshot', {
+        format: FULL_PAGE_SCREENSHOT_FORMAT,
+        quality: FULL_PAGE_SCREENSHOT_QUALITY,
+      }),
+    ]);
     const data = `data:image/${FULL_PAGE_SCREENSHOT_FORMAT};base64,` + result.data;
 
     return {