Is there any room for optimization?

This is a created article in which the information may have evolved or changed. One of my Web services with go write high load, the following is some information of pprof, want to ask, like these calls from the code point of view there is room to optimize? Supplemental Instructions: is a count of services that exist in a global map, with virtually no other operations "' (pprof) top109010ms of 17440ms Total (51.66%) Dropped 310 nodes (cum <= 87.20ms) Showing top nodes out of 185 (cum >= 230ms) flat flat% sum% cum cum% 5240ms 30.05% 30.05% 5330ms 30.56% syscall. Syscall 820ms 4.70% 34.75% 970ms 5.56% Syscall. Syscall6 580ms 3.33% 38.07% 580ms 3.33% runtime.epollctl 470ms 2.69% 40.77% 1050ms 6.02% runtime.pcvalue 430ms 2.47% 43.23 % 430ms 2.47% runtime._externalcode 420ms 2.41% 45.64% 1350ms 7.74% runtime.mallocgc 300ms 1.72% 47.36% 300ms 1.72% Runtim E.readvarint 280ms 1.61% 48.97% 2090ms 11.98% runtime.gentraceback 240ms 1.38% 50.34% 1040ms 5.96% runtime.adjustframe 230 Ms 1.32% 51.66% 230ms 1.32% runtime.adjustpointers "288 reads