Bartosz Taudul 2f17e33851 Prevent duplicate callstack frame queries.
Callstack frames will now have nullptr as the value in the callstackFrameMap
map, as a way to signal that a query for given key is already pending.
Duplicate queries should no longer happen.

@slomp provided alternative implementation, which produced the following
results:

Queries made: 195,778
Duplicate queries skipped: 9,518,910

Co-authored-by: Marcos Slomp <slomp@adobe.com>
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Tracy Profiler

Sponsor

A real time, nanosecond resolution, remote telemetry, hybrid frame and sampling profiler for games and other applications.

Tracy supports profiling CPU (Direct support is provided for C, C++, Lua, Python and Fortran integration. At the same time, third-party bindings to many other languages exist on the internet, such as Rust, Zig, C#, OCaml, Odin, etc.), GPU (All major graphic APIs: OpenGL, Vulkan, Direct3D 11/12, Metal, OpenCL, CUDA.), memory allocations, locks, context switches, automatically attribute screenshots to captured frames, and much more.

An Introduction to Tracy Profiler in C++ - Marcos Slomp - CppCon 2023

Introduction to Tracy Profiler v0.2
New features in Tracy Profiler v0.3
New features in Tracy Profiler v0.4
New features in Tracy Profiler v0.5
New features in Tracy Profiler v0.6
New features in Tracy Profiler v0.7
New features in Tracy Profiler v0.8

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