chaoyli edited a comment on issue #2895: Import new ThreadPool framework URL: https://github.com/apache/incubator-doris/pull/2895#issuecomment-585763911 This patch imports many basis class. 1. scoped_refptr scoped_refptr is used to replace std::shared_ptr, is generally faster and smaller. **advantage** - only requires a single allocation, and ref count is on the same cache line as the object (2) the pointer only requires 8 bytes (since the ref count is within the object) (3) you can manually increase or decrease reference counts when more control is required (4) you can convert from a raw pointer back to a scoped_refptr safely without worrying about double freeing (5) since we control the implementation, we can implement features, such as debug builds that capture the stack trace of every referent to help debug leaks. **disadvantage** (1) the referred-to object must inherit from RefCounted (2) does not support the weak_ptr use cases 2. MonoTime The MonoTime represents a particular point in time, relative to some fixed but unspecified reference point. 3. MonoDelta The MonoDelta class represents an elapsed duration of time, the delta between two MonoTime instances.
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