add a method to set the indentJsonIndentString used in Context.IndentedJSON

CHANGELOG.md

@@ -1,3 +1,11 @@
+# Gin ChangeLog
+
+## Gin v1.6.3
+
+### ENHANCEMENTS
+
+  * Improve performance: Change `*sync.RWMutex` to `sync.RWMutex` in context. [#2351](https://github.com/gin-gonic/gin/pull/2351)
+
 ## Gin v1.6.2
 
 ### BUFIXES

README.md

@@ -5,7 +5,7 @@
 [![Build Status](https://travis-ci.org/gin-gonic/gin.svg)](https://travis-ci.org/gin-gonic/gin)
 [![codecov](https://codecov.io/gh/gin-gonic/gin/branch/master/graph/badge.svg)](https://codecov.io/gh/gin-gonic/gin)
 [![Go Report Card](https://goreportcard.com/badge/github.com/gin-gonic/gin)](https://goreportcard.com/report/github.com/gin-gonic/gin)
-[![GoDoc](https://godoc.org/github.com/gin-gonic/gin?status.svg)](https://godoc.org/github.com/gin-gonic/gin)
+[![GoDoc](https://godoc.org/github.com/gin-gonic/gin?status.svg)](https://pkg.go.dev/github.com/gin-gonic/gin?tab=doc)
 [![Join the chat at https://gitter.im/gin-gonic/gin](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/gin-gonic/gin?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![Sourcegraph](https://sourcegraph.com/github.com/gin-gonic/gin/-/badge.svg)](https://sourcegraph.com/github.com/gin-gonic/gin?badge)
 [![Open Source Helpers](https://www.codetriage.com/gin-gonic/gin/badges/users.svg)](https://www.codetriage.com/gin-gonic/gin)
@@ -54,6 +54,7 @@ Gin is a web framework written in Go (Golang). It features a martini-like API wi
       - [AsciiJSON](#asciijson)
       - [PureJSON](#purejson)
     - [Serving static files](#serving-static-files)
+    - [Serving data from file](#serving-data-from-file)
     - [Serving data from reader](#serving-data-from-reader)
     - [HTML rendering](#html-rendering)
       - [Custom Template renderer](#custom-template-renderer)
@@ -68,6 +69,8 @@ Gin is a web framework written in Go (Golang). It features a martini-like API wi
     - [Support Let's Encrypt](#support-lets-encrypt)
     - [Run multiple service using Gin](#run-multiple-service-using-gin)
     - [Graceful shutdown or restart](#graceful-shutdown-or-restart)
+      - [Third-party packages](#third-party-packages)
+      - [Manually](#manually)
     - [Build a single binary with templates](#build-a-single-binary-with-templates)
     - [Bind form-data request with custom struct](#bind-form-data-request-with-custom-struct)
     - [Try to bind body into different structs](#try-to-bind-body-into-different-structs)
@@ -133,35 +136,38 @@ Gin uses a custom version of [HttpRouter](https://github.com/julienschmidt/httpr
 
 [See all benchmarks](/BENCHMARKS.md)
 
-Benchmark name                              | (1)        | (2)         | (3) 		    | (4)
+| Benchmark name                 |       (1) |             (2) |          (3) |             (4) |
---------------------------------------------|-----------:|------------:|-----------:|---------:
+| ------------------------------ | ---------:| ---------------:| ------------:| ---------------:|
-**BenchmarkGin_GithubAll**                  | **30000**  |  **48375**  |     **0**  |   **0**
+| BenchmarkGin_GithubAll         | **43550** | **27364 ns/op** |   **0 B/op** | **0 allocs/op** |
-BenchmarkAce_GithubAll                      |   10000    |   134059    |   13792    |   167
+| BenchmarkAce_GithubAll         |     40543 |     29670 ns/op |       0 B/op |     0 allocs/op |
-BenchmarkBear_GithubAll                     |    5000    |   534445    |   86448    |   943
+| BenchmarkAero_GithubAll        |     57632 |     20648 ns/op |       0 B/op |     0 allocs/op |
-BenchmarkBeego_GithubAll                    |    3000    |   592444    |   74705    |   812
+| BenchmarkBear_GithubAll        |      9234 |    216179 ns/op |   86448 B/op |   943 allocs/op |
-BenchmarkBone_GithubAll                     |     200    |  6957308    |  698784    |  8453
+| BenchmarkBeego_GithubAll       |      7407 |    243496 ns/op |   71456 B/op |   609 allocs/op |
-BenchmarkDenco_GithubAll                    |   10000    |   158819    |   20224    |   167
+| BenchmarkBone_GithubAll        |       420 |   2922835 ns/op |  720160 B/op |  8620 allocs/op |
-BenchmarkEcho_GithubAll                     |   10000    |   154700    |    6496    |   203
+| BenchmarkChi_GithubAll         |      7620 |    238331 ns/op |   87696 B/op |   609 allocs/op |
-BenchmarkGocraftWeb_GithubAll               |    3000    |   570806    |  131656    |  1686
+| BenchmarkDenco_GithubAll       |     18355 |     64494 ns/op |   20224 B/op |   167 allocs/op |
-BenchmarkGoji_GithubAll                     |    2000    |   818034    |   56112    |   334
+| BenchmarkEcho_GithubAll        |     31251 |     38479 ns/op |       0 B/op |     0 allocs/op |
-BenchmarkGojiv2_GithubAll                   |    2000    |  1213973    |  274768    |  3712
+| BenchmarkGocraftWeb_GithubAll  |      4117 |    300062 ns/op |  131656 B/op |  1686 allocs/op |
-BenchmarkGoJsonRest_GithubAll               |    2000    |   785796    |  134371    |  2737
+| BenchmarkGoji_GithubAll        |      3274 |    416158 ns/op |   56112 B/op |   334 allocs/op |
-BenchmarkGoRestful_GithubAll                |     300    |  5238188    |  689672    |  4519
+| BenchmarkGojiv2_GithubAll      |      1402 |    870518 ns/op |  352720 B/op |  4321 allocs/op |
-BenchmarkGorillaMux_GithubAll               |     100    | 10257726    |  211840    |  2272
+| BenchmarkGoJsonRest_GithubAll  |      2976 |    401507 ns/op |  134371 B/op |  2737 allocs/op |
-BenchmarkHttpRouter_GithubAll               |   20000    |   105414    |   13792    |   167
+| BenchmarkGoRestful_GithubAll   |       410 |   2913158 ns/op |  910144 B/op |  2938 allocs/op |
-BenchmarkHttpTreeMux_GithubAll              |   10000    |   319934    |   65856    |   671
+| BenchmarkGorillaMux_GithubAll  |       346 |   3384987 ns/op |  251650 B/op |  1994 allocs/op |
-BenchmarkKocha_GithubAll                    |   10000    |   209442    |   23304    |   843
+| BenchmarkGowwwRouter_GithubAll |     10000 |    143025 ns/op |   72144 B/op |   501 allocs/op |
-BenchmarkLARS_GithubAll                     |   20000    |    62565    |       0    |     0
+| BenchmarkHttpRouter_GithubAll  |     55938 |     21360 ns/op |       0 B/op |     0 allocs/op |
-BenchmarkMacaron_GithubAll                  |    2000    |  1161270    |  204194    |  2000
+| BenchmarkHttpTreeMux_GithubAll |     10000 |    153944 ns/op |   65856 B/op |   671 allocs/op |
-BenchmarkMartini_GithubAll                  |     200    |  9991713    |  226549    |  2325
+| BenchmarkKocha_GithubAll       |     10000 |    106315 ns/op |   23304 B/op |   843 allocs/op |
-BenchmarkPat_GithubAll                      |     200    |  5590793    | 1499568    | 27435
+| BenchmarkLARS_GithubAll        |     47779 |     25084 ns/op |       0 B/op |     0 allocs/op |
-BenchmarkPossum_GithubAll                   |   10000    |   319768    |   84448    |   609
+| BenchmarkMacaron_GithubAll     |      3266 |    371907 ns/op |  149409 B/op |  1624 allocs/op |
-BenchmarkR2router_GithubAll                 |   10000    |   305134    |   77328    |   979
+| BenchmarkMartini_GithubAll     |       331 |   3444706 ns/op |  226551 B/op |  2325 allocs/op |
-BenchmarkRivet_GithubAll                    |   10000    |   132134    |   16272    |   167
+| BenchmarkPat_GithubAll         |       273 |   4381818 ns/op | 1483152 B/op | 26963 allocs/op |
-BenchmarkTango_GithubAll                    |    3000    |   552754    |   63826    |  1618
+| BenchmarkPossum_GithubAll      |     10000 |    164367 ns/op |   84448 B/op |   609 allocs/op |
-BenchmarkTigerTonic_GithubAll               |    1000    |  1439483    |  239104    |  5374
+| BenchmarkR2router_GithubAll    |     10000 |    160220 ns/op |   77328 B/op |   979 allocs/op |
-BenchmarkTraffic_GithubAll                  |     100    | 11383067    | 2659329    | 21848
+| BenchmarkRivet_GithubAll       |     14625 |     82453 ns/op |   16272 B/op |   167 allocs/op |
-BenchmarkVulcan_GithubAll                   |    5000    |   394253    |   19894    |   609
+| BenchmarkTango_GithubAll       |      6255 |    279611 ns/op |   63826 B/op |  1618 allocs/op |
+| BenchmarkTigerTonic_GithubAll  |      2008 |    687874 ns/op |  193856 B/op |  4474 allocs/op |
+| BenchmarkTraffic_GithubAll     |       355 |   3478508 ns/op |  820744 B/op | 14114 allocs/op |
+| BenchmarkVulcan_GithubAll      |      6885 |    193333 ns/op |   19894 B/op |   609 allocs/op |
 
 - (1): Total Repetitions achieved in constant time, higher means more confident result
 - (2): Single Repetition Duration (ns/op), lower is better

auth.go

@@ -70,8 +70,9 @@ func BasicAuth(accounts Accounts) HandlerFunc {
 }
 
 func processAccounts(accounts Accounts) authPairs {
-	assert1(len(accounts) > 0, "Empty list of authorized credentials")
+	length := len(accounts)
-	pairs := make(authPairs, 0, len(accounts))
+	assert1(length > 0, "Empty list of authorized credentials")
+	pairs := make(authPairs, 0, length)
 	for user, password := range accounts {
 		assert1(user != "", "User can not be empty")
 		value := authorizationHeader(user, password)

context.go

@@ -34,9 +34,11 @@ const (
 	MIMEPOSTForm          = binding.MIMEPOSTForm
 	MIMEMultipartPOSTForm = binding.MIMEMultipartPOSTForm
 	MIMEYAML              = binding.MIMEYAML
-	BodyBytesKey          = "_gin-gonic/gin/bodybyteskey"
 )
 
+// BodyBytesKey indicates a default body bytes key.
+const BodyBytesKey = "_gin-gonic/gin/bodybyteskey"
+
 const abortIndex int8 = math.MaxInt8 / 2
 
 // Context is the most important part of gin. It allows us to pass variables between middleware,
@@ -54,7 +56,7 @@ type Context struct {
 	engine *Engine
 
 	// This mutex protect Keys map
-	KeysMutex *sync.RWMutex
+	mu sync.RWMutex
 
 	// Keys is a key/value pair exclusively for the context of each request.
 	Keys map[string]interface{}
@@ -86,7 +88,7 @@ func (c *Context) reset() {
 	c.Params = c.Params[0:0]
 	c.handlers = nil
 	c.index = -1
-	c.KeysMutex = &sync.RWMutex{}
+
 	c.fullPath = ""
 	c.Keys = nil
 	c.Errors = c.Errors[0:0]
@@ -98,7 +100,12 @@ func (c *Context) reset() {
 // Copy returns a copy of the current context that can be safely used outside the request's scope.
 // This has to be used when the context has to be passed to a goroutine.
 func (c *Context) Copy() *Context {
-	var cp = *c
+	cp := Context{
+		writermem: c.writermem,
+		Request:   c.Request,
+		Params:    c.Params,
+		engine:    c.engine,
+	}
 	cp.writermem.ResponseWriter = nil
 	cp.Writer = &cp.writermem
 	cp.index = abortIndex
@@ -228,29 +235,21 @@ func (c *Context) Error(err error) *Error {
 // Set is used to store a new key/value pair exclusively for this context.
 // It also lazy initializes  c.Keys if it was not used previously.
 func (c *Context) Set(key string, value interface{}) {
-	if c.KeysMutex == nil {
+	c.mu.Lock()
-		c.KeysMutex = &sync.RWMutex{}
-	}
-
-	c.KeysMutex.Lock()
 	if c.Keys == nil {
 		c.Keys = make(map[string]interface{})
 	}
 
 	c.Keys[key] = value
-	c.KeysMutex.Unlock()
+	c.mu.Unlock()
 }
 
 // Get returns the value for the given key, ie: (value, true).
 // If the value does not exists it returns (nil, false)
 func (c *Context) Get(key string) (value interface{}, exists bool) {
-	if c.KeysMutex == nil {
+	c.mu.RLock()
-		c.KeysMutex = &sync.RWMutex{}
-	}
-
-	c.KeysMutex.RLock()
 	value, exists = c.Keys[key]
-	c.KeysMutex.RUnlock()
+	c.mu.RUnlock()
 	return
 }
 
@@ -866,7 +865,7 @@ func (c *Context) IndentedJSON(code int, obj interface{}) {
 // Default prepends "while(1)," to response body if the given struct is array values.
 // It also sets the Content-Type as "application/json".
 func (c *Context) SecureJSON(code int, obj interface{}) {
-	c.Render(code, render.SecureJSON{Prefix: c.engine.secureJsonPrefix, Data: obj})
+	c.Render(code, render.SecureJSON{Prefix: c.engine.secureJSONPrefix, Data: obj})
 }
 
 // JSONP serializes the given struct as JSON into the response body.

gin.go

@@ -24,11 +24,12 @@ const defaultMultipartMemory = 32 << 20 // 32 MB
 var spaceString = " "
 
 var (
-	default404Body   = []byte("404 page not found")
+	default404Body = []byte("404 page not found")
-	default405Body   = []byte("405 method not allowed")
+	default405Body = []byte("405 method not allowed")
-	defaultAppEngine bool
 )
 
+var defaultAppEngine bool
+
 // HandlerFunc defines the handler used by gin middleware as return value.
 type HandlerFunc func(*Context)
 
@@ -106,16 +107,16 @@ type Engine struct {
 	// See the PR #1817 and issue #1644
 	RemoveExtraSlash bool
 
-	delims                 render.Delims
+	delims           render.Delims
-	secureJsonPrefix       string
+	secureJSONPrefix string
-	HTMLRender             render.HTMLRender
+	HTMLRender       render.HTMLRender
-	FuncMap                template.FuncMap
+	FuncMap          template.FuncMap
-	allNoRoute             HandlersChain
+	allNoRoute       HandlersChain
-	allNoMethod            HandlersChain
+	allNoMethod      HandlersChain
-	noRoute                HandlersChain
+	noRoute          HandlersChain
-	noMethod               HandlersChain
+	noMethod         HandlersChain
-	pool                   sync.Pool
+	pool             sync.Pool
-	trees                  methodTrees
+	trees            methodTrees
 	indentJsonIndentString string
 }
 
@@ -149,7 +150,7 @@ func New() *Engine {
 		MaxMultipartMemory:     defaultMultipartMemory,
 		trees:                  make(methodTrees, 0, 9),
 		delims:                 render.Delims{Left: "{{", Right: "}}"},
-		secureJsonPrefix:       "while(1);",
+		secureJSONPrefix:       "while(1);",
 		indentJsonIndentString: strings.Repeat(spaceString, 4),
 	}
 	engine.RouterGroup.engine = engine
@@ -168,7 +169,7 @@ func Default() *Engine {
 }
 
 func (engine *Engine) allocateContext() *Context {
-	return &Context{engine: engine, KeysMutex: &sync.RWMutex{}}
+	return &Context{engine: engine}
 }
 
 // Delims sets template left and right delims and returns a Engine instance.
@@ -177,9 +178,9 @@ func (engine *Engine) Delims(left, right string) *Engine {
 	return engine
 }
 
-// SecureJsonPrefix sets the secureJsonPrefix used in Context.SecureJSON.
+// SecureJsonPrefix sets the secureJSONPrefix used in Context.SecureJSON.
 func (engine *Engine) SecureJsonPrefix(prefix string) *Engine {
-	engine.secureJsonPrefix = prefix
+	engine.secureJSONPrefix = prefix
 	return engine
 }
 

githubapi_test.go

@@ -291,13 +291,13 @@ func TestShouldBindUri(t *testing.T) {
 
 	type Person struct {
 		Name string `uri:"name" binding:"required"`
-		Id   string `uri:"id" binding:"required"`
+		ID   string `uri:"id" binding:"required"`
 	}
 	router.Handle(http.MethodGet, "/rest/:name/:id", func(c *Context) {
 		var person Person
 		assert.NoError(t, c.ShouldBindUri(&person))
 		assert.True(t, "" != person.Name)
-		assert.True(t, "" != person.Id)
+		assert.True(t, "" != person.ID)
 		c.String(http.StatusOK, "ShouldBindUri test OK")
 	})
 
@@ -313,13 +313,13 @@ func TestBindUri(t *testing.T) {
 
 	type Person struct {
 		Name string `uri:"name" binding:"required"`
-		Id   string `uri:"id" binding:"required"`
+		ID   string `uri:"id" binding:"required"`
 	}
 	router.Handle(http.MethodGet, "/rest/:name/:id", func(c *Context) {
 		var person Person
 		assert.NoError(t, c.BindUri(&person))
 		assert.True(t, "" != person.Name)
-		assert.True(t, "" != person.Id)
+		assert.True(t, "" != person.ID)
 		c.String(http.StatusOK, "BindUri test OK")
 	})
 

internal/json/jsoniter.go

@@ -6,7 +6,7 @@
 
 package json
 
-import "github.com/json-iterator/go"
+import jsoniter "github.com/json-iterator/go"
 
 var (
 	json = jsoniter.ConfigCompatibleWithStandardLibrary

mode.go

@@ -22,6 +22,7 @@ const (
 	// TestMode indicates gin mode is test.
 	TestMode = "test"
 )
+
 const (
 	debugCode = iota
 	releaseCode

path.go

@@ -136,10 +136,11 @@ func bufApp(buf *[]byte, s string, w int, c byte) {
 
 		// Otherwise use either the stack buffer, if it is large enough, or
 		// allocate a new buffer on the heap, and copy all previous characters.
-		if l := len(s); l > cap(b) {
+		length := len(s)
-			*buf = make([]byte, len(s))
+		if length > cap(b) {
+			*buf = make([]byte, length)
 		} else {
-			*buf = (*buf)[:l]
+			*buf = (*buf)[:length]
 		}
 		b = *buf
 

recovery.go

@@ -146,6 +146,6 @@ func function(pc uintptr) []byte {
 }
 
 func timeFormat(t time.Time) string {
-	var timeString = t.Format("2006/01/02 - 15:04:05")
+	timeString := t.Format("2006/01/02 - 15:04:05")
 	return timeString
 }

routes_test.go

@@ -514,7 +514,7 @@ func TestMiddlewareCalledOnceByRouterStaticFSNotFound(t *testing.T) {
 	// Middleware must be called just only once by per request.
 	middlewareCalledNum := 0
 	router.Use(func(c *Context) {
-		middlewareCalledNum += 1
+		middlewareCalledNum++
 	})
 
 	router.StaticFS("/", http.FileSystem(http.Dir("/thisreallydoesntexist/")))

version.go

@@ -5,4 +5,4 @@
 package gin
 
 // Version is the current gin framework's version.
-const Version = "v1.6.2"
+const Version = "v1.6.3"