用于启用或禁用垃圾收集增量模式。
增量模式是一种尽量减少垃圾收集导致的中断时间的功能。如果启用，垃圾收集任务分为更小的切片，以增量方式执行而不是一次性执行。这样，可以减少长时间的中断，而是更多较短时间的中断，从而提高项目帧率的一致性，使内容运行更平稳。要更详细地了解如何判断这是否有益于项目，请参阅了解自动内存管理。
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