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Please help: Very slow "Start Render" time
11-11-2015, 04:22 AM
Post: #18
RE: Please help: Very slow "Start Render" time
We ran some tests on another consulting work and found that the "start render" time on WPT is actually a reporting nuance that you need to consider.

The TTFB, as per the standard is just the time from the time request was sent to the time the first byte was received. For example, in this WPT test, the home page TTFB is 40 ms
http://www.webpagetest.org/result/151101...s/#request

However, the reported "First Byte" is a sum of the following:
DNS lookup + TCP connection + SSL handshake + TTFB. In the first request, this amounts to
32 + 30 + 128 + 40 = 230 ms. The reported "start render" time is 231ms.

So there are a lot of factors that could throw off your the reported value of the first byte time. However, I am not sure on why there is a variation by browser to that large extent.

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RE: Please help: Very slow "Start Render" time - akshayranganath - 11-11-2015 04:22 AM

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