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ea25e62e3c
Currently the profiler mostly uses an array of strings to represent which features are available and in use. This patch changes the profiler core to use a uint32_t bitfield, which is a much simpler and faster representation. (nsProfiler and the profiler add-on still use the array of strings, alas.) The new ProfilerFeature type defines the values in the bitfield. One side-effect of this change is that profiler_feature_active() now can be used to query all features. Previously it was just a subset. Another side-effect is that profiler_get_available_features() no longer incorrectly indicates support for Java and stack-walking when they aren't supported. (The handling of task tracer support is unchanged, because the old code handled it correctly.)
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