Go 碰到的内存问题

通过 linux top 查看到程序占用了 1.8G 内存，但使用 go tool pprof 查看到的只有几 M

go tool  pprof  http://localhost:6060/debug/pprof/heap

(pprof) top
Showing nodes accounting for 1.78MB, 100% of 1.78MB total
      flat  flat%   sum%        cum   cum%
    1.78MB   100%   100%     1.78MB   100%  github.com/mozillazg/go-pinyin.init /root/local/go/src/github.com/mozillazg/go-pinyin/pinyin_dict.go
         0     0%   100%     1.78MB   100%  _/root/projections/rpc/gox.init <autogenerated>
         0     0%   100%     1.78MB   100%  main.init <autogenerated>
         0     0%   100%     1.78MB   100%  runtime.main /root/go/src/runtime/proc.go
(pprof)