I went to figure out why gatsbyjs.com’s lighthouse performance score had jumped up ~10 points in the last 24 hours and found that Google Tag Manager was 404-ing 😅

Also posted to Bluesky.
17 replies
truly the bane of every page on which i've been forced to include it
perf improves when javascript fails 👀
@zachleat Do you mean to tell me that indiscriminate analytics-gathering can be problematic?
perf improves when javascript fails 👀
JavaScript will continue to fail until perf improves
who would've thought!
oh my god
*slaps roof* this bad boy can serve so much JavaScript
stakeholders or performance vampires
Oh, third-party hell from Tag Manager always drastically worsens Lighthouse scores, even if they were initially good