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Draft: lima: Do not create new out-fence if there are no jobs submitted

Roman Stratiienko requested to merge roman.stratiienko/mesa:lima-avoid-redundant-fence-creation into main

Creating/destroying fence takes some CPU time which can be avoided. Flamegraph shows that about 1.22% of total frame draw CPU time can be saved (8% of eglSwapBuffersWithDamage CPU time).

ADD: After this change CPU time in second dri_flush is 0.36%

inferno

Edited by Roman Stratiienko

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