Couldn't understand formula for Target first byte Time.
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08-25-2017, 02:34 AM
Post: #1
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Couldn't understand formula for Target first byte Time.
Hello. I know that this topic has been answered a few times, But I can't reproduce exact formula for target first byte calculation. I almost broke my head off.
For example - here is the test results http://www.webpagetest.org/result/170824...imization/ As you can see Target FB time - 583 ms Target First Byte Time Im getting in API runs->1->firstView "connect_ms": 161, "dns_start": 0, "dns_end": 371, "connect_start": 371, "connect_end": 532, "ssl_start": 0, "ssl_end": 0, So as Glossary says Im making calculations: connect_ms + dns + ssl = 532ms. It is not the result that I see on the above link. Can you help me, please? |
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08-26-2017, 01:22 AM
Post: #2
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RE: Couldn't understand formula for Target first byte Time.
You can see the code here - https://github.com/WPO-Foundation/webpag...c.php#L247
The target is essentially 3 * Round Trip Time + TLS + 100ms Andy Using WebPageTest - http://usingwpt.com/ |
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08-26-2017, 02:00 AM
Post: #3
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RE: Couldn't understand formula for Target first byte Time.
man you are the Man. You just saved my day, thanx
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