The Scenario
The deploy finished 20 minutes ago. You're the web performance manager and your post-deploy checklist has one standing item: retest all eight monitored GTmetrix pages and confirm the grades haven't slipped.
You open the shared Google Sheet. The page IDs are all there in column A — you set this up three months ago specifically for this purpose. But the process is still: open GTmetrix, click into each page, hit Retest, wait, come back, record the result. Eight times.
The last deploy took 45 minutes to clear because one page's LCP spiked and nobody noticed until the next morning, when a stakeholder flagged it.
The bad version:
- Open GTmetrix dashboard, find page ID pg_001, click Retest, start the 60-second wait.
- While waiting, switch to page pg_002 and kick off its retest. Try to track both in your head.
- When pg_001 finishes, open the sheet, find the right row, type in the grade and score. Miss the pg_002 completion notification.
- Repeat this juggling act for six more pages, over 15 minutes, while Slack messages are piling up.
The point of post-deploy checks is to catch regressions immediately. The current process introduces exactly the kind of distraction that causes you to miss them.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent inside your Google Sheet. It reads the page IDs from column A, triggers a GTmetrix retest for each one, waits for completion, and writes the fresh grades and scores back into the sheet — while you handle the post-deploy Slack thread.
Retest every GTmetrix page whose ID is in column A of the "Post-Deploy Check" sheet and write the new GTmetrix Grade into column B and the new performance score into column C once each test completes.
What You Get
- Column B: Fresh GTmetrix letter grade for each page, updated from the new test.
- Column C: Updated performance score (0–100).
- Rows where a retest fails return an error note in column D rather than leaving the cell blank.
- The original values in columns B and C are overwritten with fresh results.
What If the Data Is Not Quite Ready
You want to preserve the pre-deploy scores and add fresh ones in new columns
Retest every GTmetrix page whose ID is in column A of the "Post-Deploy Check" sheet. Write the new grade into column D and the new performance score into column E, leaving the pre-deploy grade in column B and pre-deploy score in column C untouched.
Only retest pages marked "active" in column C
Retest every GTmetrix page in column A of the "Post-Deploy Check" sheet where column C says "active." Write the new grade into column D and the new performance score into column E.
Flag any page where the new score is more than 5 points lower than the pre-deploy score
Retest every GTmetrix page whose ID is in column A. Write the new grade into column D and the new performance score into column E. In column F, flag "Regression" on any row where column E is more than 5 points lower than the pre-deploy score in column C.
Full post-deploy audit: retest all, compare against baseline, summarize pass/fail
Retest every GTmetrix page whose ID is in column A of the "Post-Deploy Check" sheet. Write the new grade into column D and the new performance score into column E. In column F, write "Pass" if the new score is within 5 points of the baseline in column C, and "Fail" otherwise. Add a row at the bottom summarizing how many pages passed and how many failed.
One prompt runs all the retests and builds the pass/fail summary in the same step.
Try It
Get the 7-day free trial of SheetXAI and open your post-deploy check sheet with GTmetrix page IDs in column A, then ask it to retest all of them and write the fresh grades and scores back. For related workflows, see Pull All GTmetrix Monitored Pages Into a Google Sheet Dashboard or the GTmetrix + Google Sheets overview.