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Something I've been missing in the benchmark-web-vitals output is the Time to Last Byte (TTLB). This is important for measuring streaming responses versus those which are output-buffered.

I was surprised to find Gemini Code Assist seemed to get this right with the first shot! Prompt:

In addition to capturing the TTFB, I want this to also include the time to last byte (TTLB) to include in the resulting metrics.

Prompt to Gemini Code Assist:

> In addition to capturing the TTFB, I want this to also include the time to last byte (TTLB) to include in the resulting metrics.

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
@westonruter westonruter changed the title Add TTLB (Time to Last Byte) and TTLB-TTFB metrics Add TTLB (Time To Last Byte) and TTLB-TTFB metrics Oct 12, 2025
@westonruter westonruter changed the title Add TTLB (Time To Last Byte) and TTLB-TTFB metrics Add TTLB (Time To Last Byte) metric Nov 15, 2025
westonruter added a commit to westonruter/wpp-research that referenced this pull request Nov 15, 2025
@westonruter westonruter marked this pull request as ready for review November 15, 2025 04:45
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