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phpincludefilesystemsoverheadoutput-buffering

Is output buffering more expensive than FS hit?

That's about it. Is OB heavier than including a file?

Solution

  • Output buffering works in RAM. Hitting the filesystem may only hit RAM (cache), but it has the potential to hit the disks. Any time you hit the disks, you're looking at at least an order of magnitude of slowness compared to straight RAM access.