Our customers is reporting a serious performance issue (expanding a this
pointer takes 70 seconds in VSCode) in a specific execution context.
Profiling shows the hot path is triggered by an expression evaluation
from libStdC++ synthetic children provider for `std::vector<bool>` since
it uses `CreateValueFromExpression()`.
This PR added a new `SBValue::CreateBoolValue()` API and switch
`std::vector<bool>` synthetic children provider to use the new API
without performing expression evaluation.
Note: there might be other cases of `CreateValueFromExpression()` in our
summary/synthetic children providers which I will sweep through in later
PRs.
With this PR, the customer's scenario reduces from 70 seconds => 50
seconds. I will add other PRs to further optimize the remaining 50
seconds (mostly from type/namespace lookup).
Testing:
`test/API/functionalities/data-formatter/data-formatter-stl/libstdcpp/vbool/TestDataFormatterStdVBool.py`
passes with the PR
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Co-authored-by: jeffreytan81 <jeffreytan@fb.com>
b6bf27ef3c