Angular 离子3和角度4-Karma不会立即运行单元测试。开始需要一分钟或更长时间。是什么造成了这种缓慢？

使用Ionic 3和Angular 4-Karma Test Runner不会立即运行单元测试。开始大约需要一分钟或更长时间。这是正常的还是我可以做些什么来加速它

下面是我正在使用的karma配置文件

module.exports=（配置）=>{

})

以下是我正在使用的依赖项和开发依赖项

"dependencies": {
"@angular/common": "4.4.4",
"@angular/compiler": "4.4.4",
"@angular/compiler-cli": "4.4.4",
"@angular/core": "4.4.4",
"@angular/forms": "4.4.4",
"@angular/http": "4.4.4",
"@angular/platform-browser": "4.4.4",
"@angular/platform-browser-dynamic": "4.4.4",
"@ionic-native/core": "4.3.2",
"@ionic-native/splash-screen": "4.3.2",
"@ionic-native/status-bar": "4.3.2",
"@ionic/storage": "2.0.1",
"angular2-text-mask": "8.0.2",
"ibm-mfp-web-sdk": "8.0.2017091403",
"intl": "^1.2.5",
"ionic-angular": "3.8.0",
"ionicons": "3.0.0",
"moment": "2.18.1",
"rxjs": "5.4.3",
"sw-toolbox": "3.6.0",
"text-mask-addons": "^3.6.0",
"zone.js": "0.8.18"

},， “依赖性”：{ “@IONAL/app脚本”：“1.3.7”， “@ionic/cli插件cordova”：“1.6.2”， “@types/jasmine”：“^2.5.47”， “@types/node”：“^7.0.15”， “angular2模板加载器”：“^0.6.2”， “可怕的类型脚本加载程序”：“3.1.3”， “codelyzer”：“3.1.2”， “同时”：“^3.4.0”， “html加载程序”：“^0.4.5”， “伊斯坦布尔仪器装载机”：“^2.0.0”， “茉莉花芯”：“^2.6.1”， “jasmine spec reporter”：“^4.1.0”， “因果报应”：“^1.6.0”， “karma chrome启动器”：“^2.0.0”， “karma cli”：“1.0.1”， “业力覆盖范围”：“^1.1.1”， “karma firefox启动器”：“^1.0.1”， “因果报应茉莉”：“^1.1.0”， “karma jasmine html reporter”：“^0.2.2”， “卡玛摩卡记者”：“^2.2.3”， “业力重映射覆盖范围”：“^0.1.4”， “karma sourcemap loader”：“^0.3.7”， “因果报应网页”：“^2.0.3”， “空加载程序”：“^0.1.1”， “原始加载程序”：“^0.5.1”， “源地图加载器”：“^0.2.1”， “ts助手”：“^1.1.2”， “ts加载器”：“^2.0.3”， “ts节点”：“^3.0.2”， “tslint”：“^5.2.0”， “tslint加载器”：“^3.5.3”， “类型脚本”：“2.2.1” }

请告知

谢谢

"dependencies": {
"@angular/common": "4.4.4",
"@angular/compiler": "4.4.4",
"@angular/compiler-cli": "4.4.4",
"@angular/core": "4.4.4",
"@angular/forms": "4.4.4",
"@angular/http": "4.4.4",
"@angular/platform-browser": "4.4.4",
"@angular/platform-browser-dynamic": "4.4.4",
"@ionic-native/core": "4.3.2",
"@ionic-native/splash-screen": "4.3.2",
"@ionic-native/status-bar": "4.3.2",
"@ionic/storage": "2.0.1",
"angular2-text-mask": "8.0.2",
"ibm-mfp-web-sdk": "8.0.2017091403",
"intl": "^1.2.5",
"ionic-angular": "3.8.0",
"ionicons": "3.0.0",
"moment": "2.18.1",
"rxjs": "5.4.3",
"sw-toolbox": "3.6.0",
"text-mask-addons": "^3.6.0",
"zone.js": "0.8.18"