goroutine 41 [running]:
runtime/pprof.writeGoroutineStacks(0x14e5f60, 0xc0001d6000, 0xc0001b6270, 0x0)
	/usr/local/Cellar/go/1.15.6/libexec/src/runtime/pprof/pprof.go:693 +0x9f
runtime/pprof.writeGoroutine(0x14e5f60, 0xc0001d6000, 0x2, 0x1714f40, 0xc0001ba420)
	/usr/local/Cellar/go/1.15.6/libexec/src/runtime/pprof/pprof.go:682 +0x45
runtime/pprof.(*Profile).WriteTo(0x17179e0, 0x14e5f60, 0xc0001d6000, 0x2, 0xc0001d6000, 0xc0003379d8)
	/usr/local/Cellar/go/1.15.6/libexec/src/runtime/pprof/pprof.go:331 +0x3f2
net/http/pprof.handler.ServeHTTP(0xc0001ca071, 0x9, 0x14ec9a0, 0xc0001d6000, 0xc000110300)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/pprof/pprof.go:256 +0x385
net/http/pprof.Index(0x14ec9a0, 0xc0001d6000, 0xc000110300)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/pprof/pprof.go:367 +0x945
net/http.HandlerFunc.ServeHTTP(0x1486d90, 0x14ec9a0, 0xc0001d6000, 0xc000110300)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/server.go:2042 +0x44
net/http.(*ServeMux).ServeHTTP(0x1725ba0, 0x14ec9a0, 0xc0001d6000, 0xc000110300)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/server.go:2417 +0x1ad
net/http.serverHandler.ServeHTTP(0xc00019c000, 0x14ec9a0, 0xc0001d6000, 0xc000110300)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/server.go:2843 +0xa3
net/http.(*conn).serve(0xc0000c6320, 0x14ed4a0, 0xc000322000)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/server.go:1925 +0x8ad
created by net/http.(*Server).Serve
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/server.go:2969 +0x36c

goroutine 1 [select]:
net/http.(*persistConn).roundTrip(0xc0000cea20, 0xc0001b40c0, 0x0, 0x0, 0x0)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/transport.go:2565 +0x779
net/http.(*Transport).roundTrip(0x171d020, 0xc0001ce000, 0x30, 0x30, 0x180de98)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/transport.go:582 +0xa65
net/http.(*Transport).RoundTrip(0x171d020, 0xc0001ce000, 0x171d020, 0x0, 0x0)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/roundtrip.go:17 +0x35
net/http.send(0xc0001ce000, 0x14e5d80, 0x171d020, 0x0, 0x0, 0x0, 0xc0001c8018, 0x203000, 0x1, 0x0)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/client.go:252 +0x453
net/http.(*Client).send(0x17259e0, 0xc0001ce000, 0x0, 0x0, 0x0, 0xc0001c8018, 0x0, 0x1, 0xf8)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/client.go:176 +0xff
net/http.(*Client).do(0x17259e0, 0xc0001ce000, 0x0, 0x0, 0x0)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/client.go:718 +0x45f
net/http.(*Client).Do(...)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/client.go:586
net/http.(*Client).Get(0x17259e0, 0xc0001cc000, 0x33, 0x2, 0x2, 0xc0001cc000)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/client.go:475 +0xbe
net/http.Get(...)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/client.go:447
main.writeHttpProfile(0x14e5940, 0xc0001b6090, 0x2, 0x0, 0x0)
	/Users/felix.geisendoerfer/go/src/github.com/felixge/go-profiler-notes/examples/goroutine/main.go:92 +0x105
main.glob..func8(0x14e5940, 0xc0001b6090, 0xc000213eb0, 0x2)
	/Users/felix.geisendoerfer/go/src/github.com/felixge/go-profiler-notes/examples/goroutine/main.go:85 +0x3e
main.writeProfiles(0x1, 0xc0000c4008, 0x146641d)
	/Users/felix.geisendoerfer/go/src/github.com/felixge/go-profiler-notes/examples/goroutine/main.go:106 +0x187
main.main()
	/Users/felix.geisendoerfer/go/src/github.com/felixge/go-profiler-notes/examples/goroutine/main.go:142 +0x2c7

goroutine 22 [sleep]:
time.Sleep(0x3b9aca00)
	/usr/local/Cellar/go/1.15.6/libexec/src/runtime/time.go:188 +0xbf
main.shortSleepLoop()
	/Users/felix.geisendoerfer/go/src/github.com/felixge/go-profiler-notes/examples/goroutine/main.go:165 +0x2a
created by main.indirectShortSleepLoop2
	/Users/felix.geisendoerfer/go/src/github.com/felixge/go-profiler-notes/examples/goroutine/main.go:185 +0x35

goroutine 3 [IO wait]:
internal/poll.runtime_pollWait(0x1e91e88, 0x72, 0x0)
	/usr/local/Cellar/go/1.15.6/libexec/src/runtime/netpoll.go:222 +0x55
internal/poll.(*pollDesc).wait(0xc00019e018, 0x72, 0x0, 0x0, 0x1465786)
	/usr/local/Cellar/go/1.15.6/libexec/src/internal/poll/fd_poll_runtime.go:87 +0x45
internal/poll.(*pollDesc).waitRead(...)
	/usr/local/Cellar/go/1.15.6/libexec/src/internal/poll/fd_poll_runtime.go:92
internal/poll.(*FD).Accept(0xc00019e000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/local/Cellar/go/1.15.6/libexec/src/internal/poll/fd_unix.go:394 +0x1fc
net.(*netFD).accept(0xc00019e000, 0x7d667d63cbbded3e, 0x1789ccbbded3e, 0x100000001)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/fd_unix.go:172 +0x45
net.(*TCPListener).accept(0xc000188060, 0x60006709, 0xc000196da8, 0x109abe6)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/tcpsock_posix.go:139 +0x32
net.(*TCPListener).Accept(0xc000188060, 0xc000196df8, 0x18, 0xc000001200, 0x12e9eec)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/tcpsock.go:261 +0x65
net/http.(*Server).Serve(0xc00019c000, 0x14ec6e0, 0xc000188060, 0x0, 0x0)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/server.go:2937 +0x266
net/http.(*Server).ListenAndServe(0xc00019c000, 0xc00019c000, 0x1475536)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/server.go:2866 +0xb7
net/http.ListenAndServe(...)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/server.go:3120
main.main.func1(0xc000032120)
	/Users/felix.geisendoerfer/go/src/github.com/felixge/go-profiler-notes/examples/goroutine/main.go:123 +0x126
created by main.main
	/Users/felix.geisendoerfer/go/src/github.com/felixge/go-profiler-notes/examples/goroutine/main.go:121 +0xc5

goroutine 4 [sleep]:
time.Sleep(0x3b9aca00)
	/usr/local/Cellar/go/1.15.6/libexec/src/runtime/time.go:188 +0xbf
main.shortSleepLoop()
	/Users/felix.geisendoerfer/go/src/github.com/felixge/go-profiler-notes/examples/goroutine/main.go:165 +0x2a
created by main.main
	/Users/felix.geisendoerfer/go/src/github.com/felixge/go-profiler-notes/examples/goroutine/main.go:130 +0x195

goroutine 5 [sleep]:
time.Sleep(0x34630b8a000)
	/usr/local/Cellar/go/1.15.6/libexec/src/runtime/time.go:188 +0xbf
main.sleepLoop(0x34630b8a000)
	/Users/felix.geisendoerfer/go/src/github.com/felixge/go-profiler-notes/examples/goroutine/main.go:171 +0x2b
created by main.main
	/Users/felix.geisendoerfer/go/src/github.com/felixge/go-profiler-notes/examples/goroutine/main.go:131 +0x1bc

goroutine 6 [chan receive]:
main.chanReceiveForever()
	/Users/felix.geisendoerfer/go/src/github.com/felixge/go-profiler-notes/examples/goroutine/main.go:177 +0x4d
created by main.main
	/Users/felix.geisendoerfer/go/src/github.com/felixge/go-profiler-notes/examples/goroutine/main.go:132 +0x1d4

goroutine 24 [select]:
net/http.(*persistConn).writeLoop(0xc0000cea20)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/transport.go:2340 +0x11c
created by net/http.(*Transport).dialConn
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/transport.go:1709 +0xcdc

goroutine 23 [IO wait]:
internal/poll.runtime_pollWait(0x1e91da0, 0x72, 0x14e6ca0)
	/usr/local/Cellar/go/1.15.6/libexec/src/runtime/netpoll.go:222 +0x55
internal/poll.(*pollDesc).wait(0xc00010e198, 0x72, 0x14e6c00, 0x16db878, 0x0)
	/usr/local/Cellar/go/1.15.6/libexec/src/internal/poll/fd_poll_runtime.go:87 +0x45
internal/poll.(*pollDesc).waitRead(...)
	/usr/local/Cellar/go/1.15.6/libexec/src/internal/poll/fd_poll_runtime.go:92
internal/poll.(*FD).Read(0xc00010e180, 0xc000256000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/Cellar/go/1.15.6/libexec/src/internal/poll/fd_unix.go:159 +0x1a5
net.(*netFD).Read(0xc00010e180, 0xc000256000, 0x1000, 0x1000, 0x103b1dc, 0xc000199b58, 0x10680e0)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/fd_posix.go:55 +0x4f
net.(*conn).Read(0xc000010008, 0xc000256000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/net.go:182 +0x8e
net/http.(*persistConn).Read(0xc0000cea20, 0xc000256000, 0x1000, 0x1000, 0xc00009e300, 0xc000199c58, 0x10074b5)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/transport.go:1887 +0x77
bufio.(*Reader).fill(0xc0001801e0)
	/usr/local/Cellar/go/1.15.6/libexec/src/bufio/bufio.go:101 +0x105
bufio.(*Reader).Peek(0xc0001801e0, 0x1, 0x0, 0x0, 0x1, 0x0, 0xc000030180)
	/usr/local/Cellar/go/1.15.6/libexec/src/bufio/bufio.go:139 +0x4f
net/http.(*persistConn).readLoop(0xc0000cea20)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/transport.go:2040 +0x1a8
created by net/http.(*Transport).dialConn
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/transport.go:1708 +0xcb7

goroutine 67 [IO wait]:
internal/poll.runtime_pollWait(0x1e91cb8, 0x72, 0x14e6ca0)
	/usr/local/Cellar/go/1.15.6/libexec/src/runtime/netpoll.go:222 +0x55
internal/poll.(*pollDesc).wait(0xc00019e098, 0x72, 0x14e6c00, 0x16db878, 0x0)
	/usr/local/Cellar/go/1.15.6/libexec/src/internal/poll/fd_poll_runtime.go:87 +0x45
internal/poll.(*pollDesc).waitRead(...)
	/usr/local/Cellar/go/1.15.6/libexec/src/internal/poll/fd_poll_runtime.go:92
internal/poll.(*FD).Read(0xc00019e080, 0xc00007c311, 0x1, 0x1, 0x0, 0x0, 0x0)
	/usr/local/Cellar/go/1.15.6/libexec/src/internal/poll/fd_unix.go:159 +0x1a5
net.(*netFD).Read(0xc00019e080, 0xc00007c311, 0x1, 0x1, 0x0, 0x0, 0x0)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/fd_posix.go:55 +0x4f
net.(*conn).Read(0xc000186028, 0xc00007c311, 0x1, 0x1, 0x0, 0x0, 0x0)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/net.go:182 +0x8e
net/http.(*connReader).backgroundRead(0xc00007c300)
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/server.go:690 +0x58
created by net/http.(*connReader).startBackgroundRead
	/usr/local/Cellar/go/1.15.6/libexec/src/net/http/server.go:686 +0xd5