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WebPagetest Forums - First load is slow

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I carried out this test:

Would you have any idea as to why the first test is always slower?

The main delay is always Time to First Byte, but always only on the first run.

Any help is appreciated.


The first run is priming the caches on your server (database, filesystem, etc) so the next runs benefit from the server-side caches.
Thank you for taking the time to reply.

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