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javascript - 用于 Angular 测试的 JS 堆内存不足

转载 作者:行者123 更新时间:2023-12-03 00:42:22 27 4
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我有一个内存问题,我正在尝试解决,但我真的不知道从哪里开始。当我运行测试时,我遇到了 JS 堆问题,并且我的测试将在不运行的情况下出错。我的预感是它是由我用于国际化的非常大的字符串文件引起的。这是一个继承的项目,所以我将概述当前发生的情况,也许有人可以帮助我找出改进的方法。

在主应用程序中

文件 inject.en.js 是一个 2.2MB json 文件,其中包含应用程序的翻译字符串。

var INJECT_en = { ... };

为了尽早使用它,它作为全局 var 包含在应用程序 index.html

<script src="js/languages/hybrid.inject.en.js" type="text/javascript"></script>

然后使用它来构建全局配置对象。

var windowJS =  new WindowService().nativeWindow;
var HybridInject = windowJS.HybridInject_en; // custom app strings
var INJECT = windowJS.INJECT_en;
var startInjector = _.merge(_.clone(HybridInject), _.clone(INJECT));

export const CONFIG: ConfigType = {
...
strings: populateStrings(startInjector),
...

}

用于测试

出于多种原因,我使用 Jest 来测试此应用程序。我尝试了一些方法来设置 Jest,以便在构建 CONFIG 时以相同的方式提供这些文件,并且我为我的 jestGlobalMocks.ts 选择了以下内容。

我将文件复制到测试目录中并将其转换为导出对象。

export const INJECT_en = { ... }

然后通过使它们在窗口上可用,使它们可用于 CONFIG 构建。

Object.defineProperty(window, 'HybridInject_en', {value: HybridInject_en});
Object.defineProperty(window, 'INJECT_en', {value: INJECT_en});

结果

运行测试时,我得到以下输出

[BABEL] Note: The code generator has deoptimised the styling of "jest/configs/inject.en.ts" as it exceeds the max of "500KB".



<--- Last few GCs --->



[208:0x37d62f0] 86678 ms: Scavenge 1384.7 (1422.5) -> 1383.8 (1423.0) MB, 11.5 / 0.1 ms (average mu = 0.143, current mu = 0.101) allocation failure

[208:0x37d62f0] 86694 ms: Scavenge 1384.7 (1423.0) -> 1383.9 (1423.5) MB, 13.5 / 0.1 ms (average mu = 0.143, current mu = 0.101) allocation failure

[208:0x37d62f0] 86710 ms: Scavenge 1384.9 (1423.5) -> 1384.2 (1424.0) MB, 13.5 / 0.1 ms (average mu = 0.143, current mu = 0.101) allocation failure





<--- JS stacktrace --->



==== JS stack trace =========================================



0: ExitFrame [pc: 0x255fdc5dbe1d]

Security context: 0x0e1a9b79e6e1 <JSObject>

1: SourceMapConsumer_allGeneratedPositionsFor [0x32dd014cb6a1] [/var/jenkins_home/workspace/base_jenkins-build/node_modules/source-map/lib/source-map-consumer.js:~178] [pc=0x255fdcb3491a](this=0x0319d2aa8031 <BasicSourceMapConsumer map = 0x68f75371d81>,aArgs=0x1954c0c022a9 <Object map = 0x68f75372671>)

2: /* anonymous */(aka /* anonymous */...



FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory

1: 0x8daaa0 node::Abort() [node]

2: 0x8daaec [node]

3: 0xad73ce v8::Utils::ReportOOMFailure(v8::internal::Isolate*, char const*, bool) [node]

4: 0xad7604 v8::internal::V8::FatalProcessOutOfMemory(v8::internal::Isolate*, char const*, bool) [node]

5: 0xec4c32 [node]

6: 0xec4d38 v8::internal::Heap::CheckIneffectiveMarkCompact(unsigned long, double) [node]

7: 0xed0e12 v8::internal::Heap::PerformGarbageCollection(v8::internal::GarbageCollector, v8::GCCallbackFlags) [node]

8: 0xed1744 v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, v8::internal::GarbageCollectionReason, v8::GCCallbackFlags) [node]

9: 0xed43b1 v8::internal::Heap::AllocateRawWithRetryOrFail(int, v8::internal::AllocationSpace, v8::internal::AllocationAlignment) [node]

10: 0xe9d834 v8::internal::Factory::NewFillerObject(int, bool, v8::internal::AllocationSpace) [node]

11: 0x113cf9e v8::internal::Runtime_AllocateInNewSpace(int, v8::internal::Object**, v8::internal::Isolate*) [node]

12: 0x255fdc5dbe1d

Aborted

npm ERR! Test failed. See above for more details.

最佳答案

package.json 的脚本部分中,您应该增加堆(下面的示例,但您需要适应您的用途,我从未使用过 Jest )

"gulp": "node --max_old_space_size=2560 ./node_modules/gulp/bin/gulp",
"run-build": "npm run gulp",
"run-build-with-switches": "npm run gulp -- myspecialtarget"

第一行设置一个脚本,每当您使用 npm run gulp 引用它时,该脚本都会以增加的堆运行 gulp。第二行将运行第一个脚本,不带参数(对于 gulp 这意味着默认目标)。第三行将使用参数 myspecialtarget 运行 gulp。

关于javascript - 用于 Angular 测试的 JS 堆内存不足,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53396833/

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