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Troubleshooting performance issues: Difference between revisions
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(→Performance factors: info from http://forum.flightgear.org/viewtopic.php?f=37&t=23128&p=210273#p210271) |
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== For the geeks out there == | == For the geeks out there == | ||
=== FPS and frame spacing === | === FPS and frame spacing === | ||
Frames per second is an average by definition, and as such is not an optimal indicator of performance, because you could have half a second with 100 FPS and the other half with 0 FPS. You'd get a respectable 50 FPS but an unacceptable stutter of 0.5 seconds. A much better one is keeping track of the maximum frame spacing, that gives a measure in milliseconds of the worst performance during a fixed interval. | Frames per second is an average by definition, and as such is not an optimal indicator of performance, because you could have half a second with 100 FPS and the other half with 0 FPS. You'd get a respectable 50 FPS but an unacceptable stutter of 0.5 seconds. A much better one is keeping track of the maximum frame spacing (i.e. the delay/time needed to create new frames), that gives a measure in milliseconds of the worst performance during a fixed interval. | ||
=== Tools for performance evaluation === | === Tools for performance evaluation === | ||