add support for conditional performance timing #439
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Description of Changes
Adds the ability to collect HostPerformanceTiming, DevicePerformanceTiming, and ChromePerformanceTiming conditionally, only when an environment variable is set. This enables developers to profile specific sections of an application and ignore other sections of code that are less important.
Testing Done
Tested with llama.cpp, slightly modified to only collect results for a certain section of the application. Verified that performance timing was collected for the region of interest and was ignored for other regions.