zhangqiongyu commented on PR #2911:
URL: https://github.com/apache/brpc/pull/2911#issuecomment-2705404957
```
const std::string& AdaptiveMaxConcurrency::UNLIMITED() {
static const std::string s = "unlimited";
return s;
}
const std::string& AdaptiveMaxConcurrency::CONSTANT() {
static const std::string s = "constant";
return s;
}
```
1.This way of initialization is much more common，uncontrolled use of global
variables may cause dependency order problems(UB).
2.These short strings can be optimized to be stored on the stack using the
SSO(Small String Optimization) mechanism of std::string.
3.The original lazy initialization mechanism is retained to reduce
unnecessary memory usage.
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