I remember looking into a similar problem once and seeing something like: rendered "foo" 2ms rendered "foo" 2ms rendered "foo" 1ms rendered "foo" 4ms

I remember looking into a similar problem once and seeing something like: rendered "foo" 2ms rendered "foo" 2ms rendered "foo" 1ms rendered "foo" 4ms rendered "foo" 175ms rendered "foo" 2ms Assuming a really simple partial (and no swapping or run queue), that looks suspiciously like a GC problem.