请教下还有优化空间吗

我的一个用go写的web服务导致负载比较高，以下是pprof的一些信息，想请问下，像这些调用从代码角度还有可以优化的空间吗？ 补充说明下：是一个计数的服务，存在一个全局map里，几乎没有其他操作 ``` (pprof) top10 9010ms of 17440ms total (51.66%) Dropped 310 nodes (cum <= 87.20ms) Showing top 10 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% runtime.readvarint 280ms 1.61% 48.97% 2090ms 11.98% runtime.gentraceback 240ms 1.38% 50.34% 1040ms 5.96% runtime.adjustframe 230ms 1.32% 51.66% 230ms 1.32% runtime.adjustpointers ```