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30
4
我正在尝试分析一个用 go 编写的应用程序，它显然使用了大约 256 个虚拟内存(使用 ps aux 检查)。我正在尝试使用 pprof打包并查看哪些函数分配/消耗了大部分内存，但结果对我来说毫无意义。 pprof top 似乎只列出了运行时函数。谁能帮我理解这些数据？
ps aux |grep android
root 4584 3.4 0.1 500244 29536 pts/1 Sl+ 17:21 0:38 ./android -logtostderr
转到工具 pprof http://localhost:6060/debug/pprof/heap
/pprof.localhost:6060.inuse_objects.inuse_space.008.pb.gz
Entering interactive mode (type "help" for commands)
(pprof) top
512.19kB of 512.19kB total ( 100%)
Dropped 19 nodes (cum <= 2.56kB)
flat flat% sum% cum cum%
512.19kB 100% 100% 512.19kB 100% runtime.malg
0 0% 100% 512.19kB 100% runtime.mcommoninit
0 0% 100% 512.19kB 100% runtime.mpreinit
0 0% 100% 512.19kB 100% runtime.rt0_go
0 0% 100% 512.19kB 100% runtime.schedinit
(pprof)
http://localhost:6060/debug/pprof/heap?debug=1
heap profile: 3: 49632 [3: 49632] @ heap/1048576
1: 49152 [1: 49152] @ 0x412c62 0x411bc9 0x6fd8c8 0x649c40 0x5497e6 0x409ad2 0x43615f 0x4669c1
# 0x6fd8c8 html.init+0xe8 /usr/local/gosrc/src/html/entity.go:2154
# 0x649c40 html/template.init+0x70 /usr/local/gosrc/src/html/template/url.go:105
# 0x5497e6 net/http/pprof.init+0x56 /usr/local/gosrc/src/net/http/pprof/pprof.go:239
# 0x409ad2 main.init+0x92 /root/go/src/github.com/ginkoob/devmg/local/android/local.go:236
# 0x43615f runtime.main+0x27f /usr/local/gosrc/src/runtime/proc.go:100
1: 384 [1: 384] @ 0x43d0e7 0x4317ef 0x437700 0x4372a9 0x464182
# 0x43d0e7 runtime.malg+0x27 /usr/local/gosrc/src/runtime/proc1.go:2172
# 0x4317ef runtime.mpreinit+0x1f /usr/local/gosrc/src/runtime/os1_linux.go:197
# 0x437700 runtime.mcommoninit+0x100 /usr/local/gosrc/src/runtime/proc1.go:114
# 0x4372a9 runtime.schedinit+0x79 /usr/local/gosrc/src/runtime/proc1.go:57
# 0x464182 runtime.rt0_go+0x132 /usr/local/gosrc/src/runtime/asm_amd64.s:109
1: 96 [1: 96] @ 0x449005 0x46a114 0x468625 0x467e71 0x4069d5 0x436190 0x4669c1
# 0x46a114 golang.org/x/mobile/gl.DoWork+0x54 /root/go/src/golang.org/x/mobile/gl/work.go:82
# 0x468625 golang.org/x/mobile/app.main+0x1d5 /root/go/src/golang.org/x/mobile/app/x11.go:65
# 0x467e71 golang.org/x/mobile/app.Main+0x21 /root/go/src/golang.org/x/mobile/app/app.go:22
# 0x4069d5 main.main+0x75 /root/go/src/github.com/ginkoob/devmg/local/android/local.go:65
# 0x436190 runtime.main+0x2b0 /usr/local/gosrc/src/runtime/proc.go:111
0: 0 [0: 0] @ 0x449005 0x6529f5 0x652936 0x64e2c4 0x54932e 0x549540 0x5222aa 0x523b0d 0x52457e 0x521d6e 0x4669c1
# 0x6529f5 runtime/pprof.writeGoroutineStacks+0x45 /usr/local/gosrc/src/runtime/pprof/pprof.go:514
# 0x652936 runtime/pprof.writeGoroutine+0x46 /usr/local/gosrc/src/runtime/pprof/pprof.go:505
# 0x64e2c4 runtime/pprof.(*Profile).WriteTo+0xd4 /usr/local/gosrc/src/runtime/pprof/pprof.go:236
# 0x54932e net/http/pprof.handler.ServeHTTP+0x37e /usr/local/gosrc/src/net/http/pprof/pprof.go:199
# 0x549540 net/http/pprof.Index+0x200 /usr/local/gosrc/src/net/http/pprof/pprof.go:211
# 0x5222aa net/http.HandlerFunc.ServeHTTP+0x3a /usr/local/gosrc/src/net/http/server.go:1422
# 0x523b0d net/http.(*ServeMux).ServeHTTP+0x17d /usr/local/gosrc/src/net/http/server.go:1699
# 0x52457e net/http.serverHandler.ServeHTTP+0x19e /usr/local/gosrc/src/net/http/server.go:1862
# 0x521d6e net/http.(*conn).serve+0xbee /usr/local/gosrc/src/net/http/server.go:1361
# runtime.MemStats
# Alloc = 2701264
# TotalAlloc = 2701264
# Sys = 7145720
# Lookups = 18
# Mallocs = 19841
# Frees = 0
# HeapAlloc = 2701264
# HeapSys = 3637248
# HeapIdle = 262144
# HeapInuse = 3375104
# HeapReleased = 0
# HeapObjects = 19841
# Stack = 557056 / 557056
# MSpan = 28896 / 32768
# MCache = 4832 / 16384
# BuckHashSys = 1443979
# NextGC = 4194304
# PauseNs = [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
# NumGC = 0
# EnableGC = true
# DebugGC = false
http://localhost:6060/debug/pprof/goroutine?debug=1
goroutine profile: total 31
1 @ 0x652ba8 0x652983 0x64e2c4 0x54932e 0x549540 0x5222aa 0x523b0d 0x52457e 0x521d6e 0x4669c1
# 0x652ba8 runtime/pprof.writeRuntimeProfile+0xb8 /usr/local/gosrc/src/runtime/pprof/pprof.go:545
# 0x652983 runtime/pprof.writeGoroutine+0x93 /usr/local/gosrc/src/runtime/pprof/pprof.go:507
# 0x64e2c4 runtime/pprof.(*Profile).WriteTo+0xd4 /usr/local/gosrc/src/runtime/pprof/pprof.go:236
# 0x54932e net/http/pprof.handler.ServeHTTP+0x37e /usr/local/gosrc/src/net/http/pprof/pprof.go:199
# 0x549540 net/http/pprof.Index+0x200 /usr/local/gosrc/src/net/http/pprof/pprof.go:211
# 0x5222aa net/http.HandlerFunc.ServeHTTP+0x3a /usr/local/gosrc/src/net/http/server.go:1422
# 0x523b0d net/http.(*ServeMux).ServeHTTP+0x17d /usr/local/gosrc/src/net/http/server.go:1699
# 0x52457e net/http.serverHandler.ServeHTTP+0x19e /usr/local/gosrc/src/net/http/server.go:1862
# 0x521d6e net/http.(*conn).serve+0xbee /usr/local/gosrc/src/net/http/server.go:1361
1 @ 0x436573 0x444ce4 0x444242 0x46871a 0x467e71 0x4069d5 0x436190 0x4669c1
# 0x46871a golang.org/x/mobile/app.main+0x2ca /root/go/src/golang.org/x/mobile/app/x11.go:61
# 0x467e71 golang.org/x/mobile/app.Main+0x21 /root/go/src/golang.org/x/mobile/app/app.go:22
# 0x4069d5 main.main+0x75 /root/go/src/github.com/nme/devmg/local/android/local.go:65
# 0x436190 runtime.main+0x2b0 /usr/local/gosrc/src/runtime/proc.go:111
1 @ 0x4669c1
1 @ 0x436573 0x436634 0x436378 0x4669c1
# 0x436573 runtime.gopark+0x163 /usr/local/gosrc/src/runtime/proc.go:186
# 0x436634 runtime.goparkunlock+0x54 /usr/local/gosrc/src/runtime/proc.go:191
# 0x436378 runtime.forcegchelper+0xb8 /usr/local/gosrc/src/runtime/proc.go:152
1 @ 0x436573 0x436634 0x42630d 0x4669c1
# 0x436573 runtime.gopark+0x163 /usr/local/gosrc/src/runtime/proc.go:186
# 0x436634 runtime.goparkunlock+0x54 /usr/local/gosrc/src/runtime/proc.go:191
# 0x42630d runtime.bgsweep+0x14d /usr/local/gosrc/src/runtime/mgcsweep.go:67
1 @ 0x436573 0x436634 0x41e04a 0x4669c1
# 0x436573 runtime.gopark+0x163 /usr/local/gosrc/src/runtime/proc.go:186
# 0x436634 runtime.goparkunlock+0x54 /usr/local/gosrc/src/runtime/proc.go:191
# 0x41e04a runtime.runfinq+0xaa /usr/local/gosrc/src/runtime/mfinal.go:154
1 @ 0x436573 0x444ce4 0x444242 0x4691e7 0x4669c1
# 0x4691e7 golang.org/x/mobile/app.pump.func1+0x527 /root/go/src/golang.org/x/mobile/app/app.go:138
1 @ 0x436573 0x436634 0x40d611 0x40ccfb 0x4acb57 0x4669c1
# 0x4acb57 github.com/golang/glog.(*loggingT).flushDaemon+0x67 /root/go/src/github.com/golang/glog/glog.go:882
1 @ 0x4173be 0x45142e 0x4669c1
# 0x4173be runtime.notetsleepg+0x4e /usr/local/gosrc/src/runtime/lock_futex.go:203
# 0x45142e runtime.timerproc+0xde /usr/local/gosrc/src/runtime/time.go:209
1 @ 0x436573 0x444ce4 0x444242 0x533327 0x4669c1
# 0x533327 net/http.(*persistConn).readLoop+0xac7 /usr/local/gosrc/src/net/http/transport.go:983
1 @ 0x436573 0x43069e 0x42fb60 0x4cd99a 0x4cda06 0x4d158c 0x4ef94d 0x5254d1 0x524853 0x524716 0x524daf 0x408e1c 0x4669c1
# 0x42fb60 net.runtime_pollWait+0x60 /usr/local/gosrc/src/runtime/netpoll.go:157
# 0x4cd99a net.(*pollDesc).Wait+0x3a /usr/local/gosrc/src/net/fd_poll_runtime.go:73
# 0x4cda06 net.(*pollDesc).WaitRead+0x36 /usr/local/gosrc/src/net/fd_poll_runtime.go:78
# 0x4d158c net.(*netFD).accept+0x27c /usr/local/gosrc/src/net/fd_unix.go:408
# 0x4ef94d net.(*TCPListener).AcceptTCP+0x4d /usr/local/gosrc/src/net/tcpsock_posix.go:254
# 0x5254d1 net/http.tcpKeepAliveListener.Accept+0x41 /usr/local/gosrc/src/net/http/server.go:2138
# 0x524853 net/http.(*Server).Serve+0xb3 /usr/local/gosrc/src/net/http/server.go:1887
# 0x524716 net/http.(*Server).ListenAndServe+0x136 /usr/local/gosrc/src/net/http/server.go:1877
# 0x524daf net/http.ListenAndServe+0x8f /usr/local/gosrc/src/net/http/server.go:1967
# 0x408e1c main.main.func1+0x3c /root/go/src/github.com/nme/devmg/local/android/local.go:40
1 @ 0x436573 0x43069e 0x42fb60 0x4cd99a 0x4cda06 0x4cf74a 0x4e3c34 0x5c0c39 0x5c14aa 0x4b0cee 0x4b5b43 0x49e028 0x49a8d0 0x49b173 0x49cf47 0x4669c1
# 0x42fb60 net.runtime_pollWait+0x60 /usr/local/gosrc/src/runtime/netpoll.go:157
# 0x4cd99a net.(*pollDesc).Wait+0x3a /usr/local/gosrc/src/net/fd_poll_runtime.go:73
# 0x4cda06 net.(*pollDesc).WaitRead+0x36 /usr/local/gosrc/src/net/fd_poll_runtime.go:78
# 0x4cf74a net.(*netFD).Read+0x23a /usr/local/gosrc/src/net/fd_unix.go:232
# 0x4e3c34 net.(*conn).Read+0xe4 /usr/local/gosrc/src/net/net.go:132
# 0x5c0c39 bufio.(*Reader).fill+0x1e9 /usr/local/gosrc/src/bufio/bufio.go:97
# 0x5c14aa bufio.(*Reader).ReadByte+0x7a /usr/local/gosrc/src/bufio/bufio.go:229
# 0x4b0cee golang.org/x/net/websocket.hybiFrameReaderFactory.NewFrameReader+0xbe /root/go/src/golang.org/x/net/websocket/hybi.go:126
# 0x4b5b43 golang.org/x/net/websocket.Codec.Receive+0x183 /root/go/src/golang.org/x/net/websocket/websocket.go:315
# 0x49e028 golang.org/x/net/websocket.(Codec).Receive-fm+0x58 /root/go/src/github.com/nme/socks/ws.go:420
# 0x49a8d0 github.com/nme/socks.(*WSConn).execute+0x210 /root/go/src/github.com/nme/socks/ws.go:389
# 0x49b173 github.com/nme/socks.(*WSConn).receiveMessage+0x203 /root/go/src/github.com/nme/socks/ws.go:420
# 0x49cf47 github.com/nme/socks.(*WSConn).Setup.func3+0x117 /root/go/src/github.com/nme/socks/ws.go:221
1 @ 0x436573 0x436634 0x40d611 0x40ccfb 0x4080af 0x406fd8 0x4092e7 0x46937f 0x4669c1
# 0x4080af main.startSocks+0x3bf /root/go/src/github.com/nme/devmg/local/android/local.go:151
# 0x406fd8 main.startClient+0x5d8 /root/go/src/github.com/nme/devmg/local/android/local.go:82
# 0x4092e7 main.main.func2+0x227 /root/go/src/github.com/nme/devmg/local/android/local.go:64
# 0x46937f golang.org/x/mobile/app.main.func1+0x6f /root/go/src/golang.org/x/mobile/app/x11.go:51
1 @ 0x436573 0x444ce4 0x444242 0x533c4c 0x4669c1
# 0x533c4c net/http.(*persistConn).writeLoop+0x40c /usr/local/gosrc/src/net/http/transport.go:1016
1 @ 0x436573 0x436634 0x40d182 0x40ccfb 0x408f63 0x4669c1
# 0x408f63 main.main.func2.1+0x73 /root/go/src/github.com/nme/devmg/local/android/local.go:47
1 @ 0x436573 0x444ce4 0x444242 0x49dcee 0x4669c1
# 0x49dcee github.com/nme/socks.(*WSConn).Setup.func4+0x86e /root/go/src/github.com/nme/socks/ws.go:256
1 @ 0x436573 0x444ce4 0x444242 0x49c7a5 0x4669c1
# 0x49c7a5 github.com/nme/socks.SetKeepAlive.func1+0x215 /root/go/src/github.com/nme/socks/ws.go:32
1 @ 0x436573 0x436634 0x40d611 0x40ccfb 0x4072c6 0x4669c1
# 0x4072c6 main.WaitCmd+0xc6 /root/go/src/github.com/nme/devmg/local/android/local.go:95
1 @ 0x436573 0x444ce4 0x444242 0x4998aa 0x4669c1
# 0x4998aa github.com/nme/socks.(*Router).ListenAndServe+0x91a /root/go/src/github.com/nme/socks/ws.go:124
1 @ 0x436573 0x444ce4 0x444242 0x49a173 0x4669c1
# 0x49a173 github.com/nme/socks.(*WSConn).Setup+0x753 /root/go/src/github.com/nme/socks/ws.go:186
1 @ 0x436573 0x436634 0x40d611 0x40ccfb 0x49b3ea 0x4669c1
# 0x49b3ea github.com/nme/socks.(*Nic).Dial.func1+0x9a /root/go/src/github.com/nme/socks/conn.go:34
3 @ 0x436573 0x444ce4 0x444242 0x49cd50 0x4669c1
# 0x49cd50 github.com/nme/socks.(*Router).ListenAndServe.func1+0x590 /root/go/src/github.com/nme/socks/ws.go:96
1 @ 0x436573 0x43069e 0x42fb60 0x4cd99a 0x4cda06 0x4cf74a 0x4e3c34 0x51a734 0x581f7d 0x5c0c39 0x5c1aaa 0x5c1b23 0x6285f1 0x628360 0x515496 0x51d83f 0x5218a7 0x4669c1
# 0x42fb60 net.runtime_pollWait+0x60 /usr/local/gosrc/src/runtime/netpoll.go:157
# 0x4cd99a net.(*pollDesc).Wait+0x3a /usr/local/gosrc/src/net/fd_poll_runtime.go:73
# 0x4cda06 net.(*pollDesc).WaitRead+0x36 /usr/local/gosrc/src/net/fd_poll_runtime.go:78
# 0x4cf74a net.(*netFD).Read+0x23a /usr/local/gosrc/src/net/fd_unix.go:232
# 0x4e3c34 net.(*conn).Read+0xe4 /usr/local/gosrc/src/net/net.go:132
# 0x51a734 net/http.(*liveSwitchReader).Read+0xa4 /usr/local/gosrc/src/net/http/server.go:219
# 0x581f7d io.(*LimitedReader).Read+0xbd /usr/local/gosrc/src/io/io.go:427
# 0x5c0c39 bufio.(*Reader).fill+0x1e9 /usr/local/gosrc/src/bufio/bufio.go:97
# 0x5c1aaa bufio.(*Reader).ReadSlice+0x21a /usr/local/gosrc/src/bufio/bufio.go:328
# 0x5c1b23 bufio.(*Reader).ReadLine+0x53 /usr/local/gosrc/src/bufio/bufio.go:357
# 0x6285f1 net/textproto.(*Reader).readLineSlice+0x81 /usr/local/gosrc/src/net/textproto/reader.go:55
# 0x628360 net/textproto.(*Reader).ReadLine+0x40 /usr/local/gosrc/src/net/textproto/reader.go:36
# 0x515496 net/http.ReadRequest+0xb6 /usr/local/gosrc/src/net/http/request.go:653
# 0x51d83f net/http.(*conn).readRequest+0x32f /usr/local/gosrc/src/net/http/server.go:633
# 0x5218a7 net/http.(*conn).serve+0x727 /usr/local/gosrc/src/net/http/server.go:1319
1 @ 0x436573 0x43069e 0x42fb60 0x4cd99a 0x4cda06 0x4cf74a 0x4e3c34 0x51a734 0x581f7d 0x5c0c39 0x5c0e5c 0x51d7cb 0x5218a7 0x4669c1
# 0x42fb60 net.runtime_pollWait+0x60 /usr/local/gosrc/src/runtime/netpoll.go:157
# 0x4cd99a net.(*pollDesc).Wait+0x3a /usr/local/gosrc/src/net/fd_poll_runtime.go:73
# 0x4cda06 net.(*pollDesc).WaitRead+0x36 /usr/local/gosrc/src/net/fd_poll_runtime.go:78
# 0x4cf74a net.(*netFD).Read+0x23a /usr/local/gosrc/src/net/fd_unix.go:232
# 0x4e3c34 net.(*conn).Read+0xe4 /usr/local/gosrc/src/net/net.go:132
# 0x51a734 net/http.(*liveSwitchReader).Read+0xa4 /usr/local/gosrc/src/net/http/server.go:219
# 0x581f7d io.(*LimitedReader).Read+0xbd /usr/local/gosrc/src/io/io.go:427
# 0x5c0c39 bufio.(*Reader).fill+0x1e9 /usr/local/gosrc/src/bufio/bufio.go:97
# 0x5c0e5c bufio.(*Reader).Peek+0xcc /usr/local/gosrc/src/bufio/bufio.go:132
# 0x51d7cb net/http.(*conn).readRequest+0x2bb /usr/local/gosrc/src/net/http/server.go:629
# 0x5218a7 net/http.(*conn).serve+0x727 /usr/local/gosrc/src/net/http/server.go:1319
1 @ 0x436573 0x436634 0x42051b 0x4669c1
# 0x436573 runtime.gopark+0x163 /usr/local/gosrc/src/runtime/proc.go:186
# 0x436634 runtime.goparkunlock+0x54 /usr/local/gosrc/src/runtime/proc.go:191
# 0x42051b runtime.backgroundgc+0x8b /usr/local/gosrc/src/runtime/mgc.go:894
4 @ 0x436573 0x421717 0x4669c1
# 0x436573 runtime.gopark+0x163 /usr/local/gosrc/src/runtime/proc.go:186
# 0x421717 runtime.gcBgMarkWorker+0xf7 /usr/local/gosrc/src/runtime/mgc.go:1283
4584 是应用程序的 PID。猫/proc/4584/状态
Name: android
State: S (sleeping)
Tgid: 4584
Ngid: 0
Pid: 4584
PPid: 2776
TracerPid: 0
Uid: 0 0 0 0
Gid: 0 0 0 0
FDSize: 256
Groups: 0
NStgid: 4584
NSpid: 4584
NSpgid: 4584
NSsid: 2776
VmPeak: 631316 kB
VmSize: 573976 kB
VmLck: 0 kB
VmPin: 0 kB
VmHWM: 30060 kB
VmRSS: 29344 kB
VmData: 487492 kB
VmStk: 136 kB
VmExe: 6704 kB
VmLib: 13404 kB
VmPTE: 288 kB
VmPMD: 20 kB
VmSwap: 0 kB
Threads: 10
SigQ: 3/62942
SigPnd: 0000000000000000
ShdPnd: 0000000000000000
SigBlk: 0000000000000000
SigIgn: 0000000000000000
SigCgt: ffffffffffc1feff
CapInh: 0000000000000000
CapPrm: 0000003fffffffff
CapEff: 0000003fffffffff
CapBnd: 0000003fffffffff
Seccomp: 0
Cpus_allowed: f
Cpus_allowed_list: 0-3
Mems_allowed: 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000001
Mems_allowed_list: 0
voluntary_ctxt_switches: 531158
nonvoluntary_ctxt_switches: 13254
最佳答案
Bradfitz 就如何使用 pprof 等工具分析 go 程序进行了精彩的演讲。
https://www.youtube.com/watch?v=xxDZuPEgbBU&feature=youtu.be
这是他在 github 上的演讲信息:
https://github.com/bradfitz/talk-yapc-asia-2015/blob/master/talk.md
希望对您有所帮助!
关于performance - 如何解释 pprof 输出？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32078061/
30
4
0
关闭。这个问题是opinion-based .它目前不接受答案。 想改善这个问题吗？更新问题，以便可以通过 editing this post 用事实和引文回答问题. 8年前关闭。 Improve t
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我正在阅读有关 Swift 的教程 ( http://www.raywenderlich.com/74438/swift-tutorial-a-quick-start )，它预定义为不显式设置类型，因
这主要是由于对 SQL 问题的回答。由于性能原因，有意省略了 UDF 和子查询。我没有包括可靠性并不是说它应该被视为理所当然，但代码必须工作。 性能永远是第一位的吗？提供了许多以性能为主要优先事项的答
我已经编写了一个简单的测试平台来测量三种阶乘实现的性能:基于循环的，非尾递归的和尾递归的。 Surprisingly to me the worst performant was the loop o
我已将 ui-performance 插件应用到我的应用程序中。不幸的是，在开发模式下运行应用程序时它似乎不起作用。例如，我的 javascript 导入是用“vnull”版本呈现的。 例如 不会
我有一个我操作的 F# 引用(我在各处添加对象池以回收经常创建和删除的短期对象)。我想运行结果报价；现在我使用了 F# PowerPack，它提供了将引用转换为表达式树和委托(delegate)的方法
我正在尝试在 Spark 服务器上运行 SparklyR 库中的机器学习算法。 1 个簇 8 核 24G内存 Ubuntu 16.04 星火2.2 独立配置 1名师傅/2名 worker 每个执行器的
我有一个数据库(准确地说是在 postgres 上运行)，具有以下结构: user1 (schema) | - cars (table) - airplanes (table, again) .
我的应用程序在我的 iPad 上运行。但它的表现非常糟糕——我的速度低于 15fps。谁能帮我优化一下？ 它基本上是一个轮子(派生自 UIView)，包含 12 个按钮(派生自 UIControl)。
在完成“Scala 中的函数式编程原则”@coursera 类(class)第 3 周的作业时，我发现当我实现视频类(class)中所示的函数联合时: override def union(tha
我正在重构我的一个 Controller 以使其成为一项服务，我想知道不将整个服务容器注入(inject)我的 Controller 是否会对性能产生影响。 这样效率更高吗: innova.path.
我有一个要显示的内容很大的文件。例如在显示用户配置文件时， 中的每个 EL 表达式需要一个 userId 作为 bean 的参数，该参数取自 session 上下文。我在 xhtml 文件中将这个 u
我非常了解 mipmapping。我不明白(在硬件/驱动程序级别)是 mipmapping 如何提高应用程序的性能(至少这是经常声称的)。在执行片段着色器之前，驱动程序不知道要访问哪个 mipmap
这个问题在这里已经有了答案: 10年前关闭。 Possible Duplicate: What's the (hidden) cost of lazy val? (Scala) Scala 允许定义惰
一些文章建议现在 build() 包含在 perform() 本身中，而其他人则建议当要链接多个操作时使用 build().perform()一起。 最佳答案 build() 包含在 perform(
Postgres docs说 For best optimization results, you should label your functions with the strictest vol
阅读Zero-cost abstractions看着 Introduction to rust: a low-level language with high-level abstractions我尝
我想在 MQ 服务器上部署 SSL，但我想知道我当前的 CPU 容量是否支持 SSL。 (我没有预算增加 CPU 内核和 MQ PVU 的数量) 我的规范: Windows 2003 服务器 SP2，
因此，我在 Chrome 开发者工具 的性能 选项卡内的时间 部分成功地监控了我的 React Native 应用程序的性能。 突然在应用程序的特定重新加载时，Timings 标签丢失。 我已尝试重置
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