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 - the pointer only requires 8 bytes (since the ref count is within the object) - you can manually increase or decrease reference counts when more control is required - you can convert from a raw pointer back to a scoped_refptr safely without worrying about double freeing - 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_** - the referred-to object must inherit from RefCounted - does not support the weak_ptr use cases 2. MonoTime/MonoDelta MonoTime: The MonoTime represents a particular point in time, relative to some fixed but unspecified reference point. MonoDelta: The MonoDelta class represents an elapsed duration of time, the delta between two MonoTime instances. 3. CountDownLatch This is a C++ implementation of the Java CountDownLatch
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