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Why does firefox load significantly faster on the second launch?

Why does firefox load significantly faster on the second launch?

I mean the second process launch. I startup the process (on Linux, using any version 3.x), it takes 5 seconds to load. Then I kill the process. There is no instance of firefox running. I startup firefox a second or third or forth time... and it always starts very quickly.

Asked by: Guest | Views: 29
Total answers/comments: 2
Guest [Entry]

Firefox is still cached in RAM, that's what makes it so fast the second time around. If you'd wait a while before starting it the second time it wouldn't be that fast. The same thing happens in Windows and Mac OS X, not just Linux.
Guest [Entry]

In Linux, unused RAM is wasted RAM so pretty much all recently opened applications are cached exactly for this purpose.