Jadx seems to use a lot of memory.

[shuajinanhai]

It seems to be using a lot of memory. My Ultra 9 285H 32GB RAM used 16GB of my RAM.

Original: 感觉很吃内存啊，我ultra9 285H 32G内存吃了我16g

[jpstotz]

Please provide more details: what jadx version do you use on what OS. What do you try to decompile and how large it ist?
Are you talking about Jadx or Jadx-Gui?

In Jadx-Gui: What is set in Preferences -> Cache -> Code Cache Mode?

See also #2664

[Ooo0xffooO]

I had the same experience: when I used jadx-mcp, it consumed 32GB of my RAM—it was absolutely terrifying. This was likely caused by the search function.

use: Jadx-Gui

use this build: https://github.com/skylot/jadx/actions/runs/23924123616

apk：https://v.qq.com/download.html#android

[skylot]

Not sure if it related to current case, but I notice occasional memory leaks in jadx-gui after project reload (can run after rename or preferences changes). Looks like some UI event listeners might not be removed and if such listener holds a reference to jadx object this lead to a leak of JadxDecompiler object and all related objects.
For now easiest way is use jmap and search JadxDecompiler object, cmd for linux:

jmap -histo:live $(ps -a -o pid,command | grep 'jadx-.*jar' | grep -v 'grep' | awk '{print $1}') | grep -F 'JadxDecompiler' | head -n 1 | awk '{print $2}'

If it outputs more than 1 this indicates a leak 🙁

I will try to fix this.
Workaround for now: restart jadx if it uses too much time after long use (enable memory usage bar in View->Show memory usage bar). Also try to apply some suggestions listed at this wiki page

[Ooo0xffooO]

我不确定这是否与当前案例相关，但我注意到在项目重新加载后（重命名或更改首选项后），jadx-gui 偶尔会出现内存泄漏。看起来某些 UI 事件监听器可能没有被移除，如果此类监听器持有对 jadx 对象的引用，则会导致该JadxDecompiler对象及其所有相关对象的泄漏。 目前最简单的解决方法是使用jmap并搜索JadxDecompiler对象，Linux 系统下可以使用以下命令：

jmap -histo:live $(ps -a -o pid,command | grep 'jadx-.*jar' | grep -v 'grep' | awk '{print $1}') | grep -F 'JadxDecompiler' | head -n 1 | awk '{print $2}'
如果输出量超过1这个值，则表示存在泄漏🙁

我会尝试修复这个问题。 目前的临时解决方案是：如果长时间使用后 jadx 占用过多时间，请重启 jadx（启用内存使用情况栏View->Show memory usage bar）。另外，也可以尝试应用此 wiki 页面上列出的一些建议。

apk：https://v.qq.com/download.html#android

Alright, I can now confirm that this APK is indeed the culprit; whenever you attempt to search for the keywords "qimei" or "ckey," its memory usage spikes to 99%.

It generated numerous errors and warnings.

kotlinx.metadata.InconsistentKotlinMetadataException: Metadata is missing: kotlin.Metadata.data1 must not be an empty array
	at kotlinx.metadata.jvm.internal.JvmExceptionUtilsKt.requireNotEmpty(JvmExceptionUtils.kt:12)
	at kotlinx.metadata.jvm.internal.JvmReadUtils.readKmClass$kotlinx_metadata_jvm(JvmReadUtils.kt:28)
	at kotlinx.metadata.jvm.KotlinClassMetadata$Class.<init>(KotlinClassMetadata.kt:100)
	at kotlinx.metadata.jvm.internal.JvmReadUtils.readMetadataImpl$kotlinx_metadata_jvm(JvmReadUtils.kt:51)
	at kotlinx.metadata.jvm.KotlinClassMetadata$Companion.readLenient(KotlinClassMetadata.kt:813)
	at jadx.plugins.kotlin.metadata.utils.KotlinMetadataExtKt.getKotlinClassMetadata(KotlinMetadataExt.kt:71)
	at jadx.plugins.kotlin.metadata.utils.KmClassWrapper$Companion.getWrapper(KmClassWrapper.kt:37)
	at jadx.plugins.kotlin.metadata.pass.KotlinMetadataDecompilePass.visit(KotlinMetadataDecompilePass.kt:35)
	at jadx.plugins.kotlin.metadata.pass.KotlinMetadataDecompilePass.visit(KotlinMetadataDecompilePass.kt:33)
	at jadx.api.impl.passes.DecompilePassWrapper.visit(DecompilePassWrapper.java:40)
	at jadx.core.dex.visitors.DepthTraversal.visit(DepthTraversal.java:11)
	at jadx.core.ProcessClass.process(ProcessClass.java:74)
	at jadx.core.ProcessClass.generateCode(ProcessClass.java:114)
	at jadx.core.dex.nodes.ClassNode.generateClassCode(ClassNode.java:403)
	at jadx.core.dex.nodes.ClassNode.decompile(ClassNode.java:391)
	at jadx.core.dex.nodes.ClassNode.decompile(ClassNode.java:311)
	at jadx.api.JavaClass.getCodeInfo(JavaClass.java:65)
	at jadx.api.JavaClass.getCode(JavaClass.java:57)
	at jadx.gui.search.providers.CodeSearchProvider.getClassCode(CodeSearchProvider.java:113)
	at jadx.gui.search.providers.CodeSearchProvider.next(CodeSearchProvider.java:57)
	at jadx.gui.search.SearchJob.run(SearchJob.java:23)
	at jadx.core.utils.tasks.TaskExecutor.wrapTask(TaskExecutor.java:168)
	at jadx.core.utils.tasks.TaskExecutor.lambda$runStages$0(TaskExecutor.java:149)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)
ERROR: Error in decompile pass: KotlinMetadataDecompile, class: com.tencent.ecologyvideo.player.plugin.ECOAttachablePagePlugin
kotlinx.metadata.InconsistentKotlinMetadataException: Metadata is missing: kotlin.Metadata.data1 must not be an empty array
	at kotlinx.metadata.jvm.internal.JvmExceptionUtilsKt.requireNotEmpty(JvmExceptionUtils.kt:12)
	at kotlinx.metadata.jvm.internal.JvmReadUtils.readKmClass$kotlinx_metadata_jvm(JvmReadUtils.kt:28)
	at kotlinx.metadata.jvm.KotlinClassMetadata$Class.<init>(KotlinClassMetadata.kt:100)
	at kotlinx.metadata.jvm.internal.JvmReadUtils.readMetadataImpl$kotlinx_metadata_jvm(JvmReadUtils.kt:51)
	at kotlinx.metadata.jvm.KotlinClassMetadata$Companion.readLenient(KotlinClassMetadata.kt:813)
	at jadx.plugins.kotlin.metadata.utils.KotlinMetadataExtKt.getKotlinClassMetadata(KotlinMetadataExt.kt:71)
	at jadx.plugins.kotlin.metadata.utils.KmClassWrapper$Companion.getWrapper(KmClassWrapper.kt:37)
	at jadx.plugins.kotlin.metadata.pass.KotlinMetadataDecompilePass.visit(KotlinMetadataDecompilePass.kt:35)
	at jadx.plugins.kotlin.metadata.pass.KotlinMetadataDecompilePass.visit(KotlinMetadataDecompilePass.kt:33)
	at jadx.api.impl.passes.DecompilePassWrapper.visit(DecompilePassWrapper.java:40)
	at jadx.core.dex.visitors.DepthTraversal.visit(DepthTraversal.java:11)
	at jadx.core.ProcessClass.process(ProcessClass.java:74)
	at jadx.core.ProcessClass.generateCode(ProcessClass.java:114)
	at jadx.core.dex.nodes.ClassNode.generateClassCode(ClassNode.java:403)
	at jadx.core.dex.nodes.ClassNode.decompile(ClassNode.java:391)
	at jadx.core.dex.nodes.ClassNode.decompile(ClassNode.java:311)
	at jadx.api.JavaClass.getCodeInfo(JavaClass.java:65)
	at jadx.api.JavaClass.getCode(JavaClass.java:57)
	at jadx.gui.search.providers.CodeSearchProvider.getClassCode(CodeSearchProvider.java:113)
	at jadx.gui.search.providers.CodeSearchProvider.next(CodeSearchProvider.java:57)
	at jadx.gui.search.SearchJob.run(SearchJob.java:23)
	at jadx.core.utils.tasks.TaskExecutor.wrapTask(TaskExecutor.java:168)
	at jadx.core.utils.tasks.TaskExecutor.lambda$runStages$0(TaskExecutor.java:149)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)

When I cancel the search, the memory usage of this APK still does not decrease.

When I switched to a different APK, there were no issues. During the search process, memory usage remained at 58%.

[shuajinanhai]

[shuajinanhai]

jadx-gui-1.5.5-win.zip 百度网盘.apk

[jpstotz]

apk：https://v.qq.com/download.html#android

@Ooo0xffooO The linked TencentVideo_V9.03.35.31410_20563.apk is pretty large, therefore it is not a surprise it will take a lot of RAM. It contains 38 DEX files with a total size of 327 MB. That is 5-10 times the size of a "normal Android app".

[Ooo0xffooO]

apk：https://v.qq.com/download.html#android

@Ooo0xffooO The linked TencentVideo_V9.03.35.31410_20563.apk is pretty large, therefore it is not a surprise it will take a lot of RAM. It contains 38 DEX files with a total size of 327 MB. That is 5-10 times the size of a "normal Android app".

ok thanks

[shuajinanhai]

顺便提个建议，能不能搜索类名时候，用完全匹配

[flleeppyy]

Similar issue with Jadx gui 1.5.5, This is with com.bandcamp.android_3.3.5 and com.bandcamp.artistapp_1.0.25 loaded into the same projoect. the second i added the artist app, and started a search for a string, jadx started eating all of my memory and CPU. These APKs are VERY small. less than 20mb combined.
My cpu is a Ryzen 7 2700, memory is 32GB DDR4

[jpstotz]

@flleeppyy Interesting approach. How do you do this - selecting both APK files in the file chooser?
Loading two individual APKs together into Jadx is a use case that Jadx isn't really designed for as the two APK files will have a lot of classes of the same name which will only displayed one by Jadx in the source code view.

When I load com.bandcamp.artistapp_1.0.25-220482_minAPI24(arm64-v8a,armeabi-v7a,x86,x86_64)(nodpi)_apkmirror.com.apk and com.bandcamp.android_3.3.5-220483_minAPI24(arm64-v8a,armeabi-v7a,x86,x86_64)(nodpi)_apkmirror.com.apk together into Jadx 1.5.5 they load as usual without any unusual CPU or RAM usage.

Do you have special plugins installed or do you use the "decompile all classes" function?