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What's your favorite profiling tool (for C++)

Are there any good tools to profile a source code which is mix of of C and C++. What are the pros and cons of any, and which ones have you used and would reccomend for usage. Please do not get me a list of tools from google. I can do that too, what i want is to leverage the personal experience of someone who has used these tools and knows the pros and cons about them.
Thanks in advance.

c++ c profiling
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