zero allocation

[dushaoshuai]

参见

• https://github.com/gin-gonic/gin#:~:text=Zero%20allocation%20router
• https://medium.com/@muroon/the-reason-why-zap-and-zerolog-make-it-zero-allocation-3ee8f69f660
• https://go.dev/ref/mem 这个好像没关系？