可以为特定项目禁用 Qt 5.8 中的 QML 缓存吗? [英] Can QML caching in Qt 5.8 be disabled for a particular project?

问题描述

Qt 5.8 应该带有可选的提前使用 qtquick 编译器，但它带有一个 sort-of-a-jit-compiler，该功能默认启用并将已编译的 QML 文件缓存在磁盘上，以便提高启动性能并减少内存使用量.

Qt 5.8 was supposed to come with the optional use ahead of time qtquick compiler, instead it arrived with a sort-of-a-jit-compiler, a feature that's enabled by default and caches compiled QML files on disk in order to improve startup performance and reduce memory usage.

然而，该功能与 严重 bugs 大大减少，或者在我的情况下甚至完全否定它的好处，因为我从一开始就没有启动时间问题，并且测试没有显示任何内存使用情况任何改进.

The feature however arrives with serious bugs which greatly diminish, or in my case even completely negate its benefits, as I didn't have a problem with startup times to begin with, and testing didn't reveal any memory usage improvements whatsoever.

所以我想做的是在我的项目中选择退出该功能，但我似乎不知道如何做到这一点.回到 Qt 5.7.1 不是一个选择，因为我的项目依赖于 5.8 引入的其他新功能.

So what I would like to do is opt out of that feature in my project, but I don't seem to find how to do that. Going back to Qt 5.7.1 is not an option since my project relies on other new features, introduced with 5.8.

推荐答案

将 QML_DISABLE_DISK_CACHE(设置为 1)添加到您的环境变量中.您应该可以通过 qputenv 在您的应用程序中执行此操作 -- 在加载 QML 内容之前将其放在 main 中.

Add QML_DISABLE_DISK_CACHE (set to 1) to your environment variables. You should be able to do it inside your application via qputenv -- put it somewhere in main before loading QML content.

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