go version go1.7.1 darwin/amd64 and binary runs on linux and compiled from osx with GOOS=linux GOARCH=amd64

(pprof) top
1.25GB of 1.25GB total (99.84%)
Dropped 209 nodes (cum <= 0.01GB)
flat flat% sum% cum cum%
1.25GB 99.84% 99.84% 1.25GB 99.84% main.tvACL.backendRequest
0 0% 99.84% 1.25GB 99.84% github.com/golang/groupcache/singleflight.(*Group).Do
0 0% 99.84% 1.25GB 99.84% github.com/gorilla/mux.(*Router).ServeHTTP
0 0% 99.84% 1.25GB 99.84% main.(*tvACL).ServeHTTP
0 0% 99.84% 1.25GB 99.84% main.tvACL.ServeHTTP
0 0% 99.84% 1.25GB 99.84% main.tvACL.ServeTV
0 0% 99.84% 1.25GB 99.84% main.tvACL.ServeTV.func3
0 0% 99.84% 1.25GB 99.84% net/http.(*conn).serve
0 0% 99.84% 1.25GB 99.84% net/http.serverHandler.ServeHTTP
0 0% 99.84% 1.25GB 100% runtime.goexit
(pprof)

(pprof) list main.tvACL.backendRequest
Total: 1.25GB
ROUTINE ======================== main.tvACL.backendRequest in /Users/mindaugas/code/rubinet/rb-cache/tvacl.go
1.25GB 1.25GB (flat, cum) 99.84% of Total
<...>
1.25GB 1.25GB 396: buff := make([]byte, resp.ContentLength, resp.ContentLength)

(pprof) list runtime.goexit
Total: 1.25GB
ROUTINE ======================== runtime.goexit in /usr/local/go/src/runtime/asm_amd64.s
0 1.25GB (flat, cum) 100% of Total
. . 2081: RET
. . 2082:
. . 2083:// The top-most function running on a goroutine
. . 2084:// returns to goexit+PCQuantum.
. . 2085:TEXT runtime·goexit(SB),NOSPLIT,$0-0
. 1.25GB 2086: BYTE $0x90 // NOP
. . 2087: CALL runtime·goexit1(SB) // does not return
. . 2088: // traceback from goexit1 must hit code range of goexit
. . 2089: BYTE $0x90 // NOP
. . 2090:
. . 2091:TEXT runtime·prefetcht0(SB),NOSPLIT,$0-8
(pprof)