![]() ![]() ![]() And if this is for work, talk to your employer about having your hardware match your needs! If your projects are much larger you will likely need more, but you probably already knew that, even just for compiling and linking the program itself. If these numbers seem impossibly low to you, come back to this point after disabling plugins and features in the following steps. After some activity it can creep up around 1.5 GiB. When I force a GC, I land around 400-600 MiB of heap used. If you click on the indicator, it will force a garbage collection and you'll see how much memory you currently "need" (of course, not including bursts during intensive analysis).įor the sizes of projects I work on, I have never hit the wall using a 2 GiB max heap size. Now you can see your current heap size, max heap size, and how much of the heap is allocated. In your bottom-most status tray, right click and enable "Memory Indicator". But the lower max heap size you have, the more the JVM has to run garbage collections to stay within that envelope, which burns CPU and can even stall operations.įortunately, IntelliJ gives you a valuable feedback tool. The more max heap size you have, the more likely you are to cause memory pressure on your operating system and start swapping out pages of memory and making things slow to a crawl (even on an SSD, though it depends a lot on the SSD and the interface to it). This is where you get to start making tradeoffs. ![]() I'm not sure where the defaults come from - they seem to vary on all of my installs - but don't assume the defaults are what's best for you. We'll work with what we have.Ĭlick Help > Custom VM Options and see what you have. ![]() Note that IntelliJ still uses the Java 11 (LTS) release train, so you can't benefit from a few years of advancements in code generation or garbage collection. For better or worse, the JVM still insists on being its own little world that hasn't learned much from the last several years of revolution in lightweight containerization with elastic resource allocation.Īt the very least, you will probably benefit from tuning the heap size options. If you're not already familair with IntelliJ, it can be surprising that it's written in Java. If more people end up using IntelliJ and the Rust plugin, it may mean more feedback so the product improves further, which would also be nice. I just want the Rust community to be happy and productive. The caveat is that people with older hardware might have to trade off one for the other to some extent, but bear with me so you at least know what options you have available and can still get the best results available to you.ĭisclaimer: I have no affiliation with JetBrains and no real skin in the game. I believe I can help you configure IntelliJ IDEs to be as featureful as one could reasonably expect a Rust IDE to be, while still being resource-efficient enough to not get in your way. Recent threads have revealed a lot of people haven't tried IntelliJ, or have but didn't see what was so good about it, or use it but grumble about things they believe it is missing. If you think IntelliJ doesn't highlight or complete something, try steps 4 and 5. If you think IntelliJ is too slow or bloated, try steps 1, 2, and 3. Re-check step 1 with new heap usage patterns.Enable Clippy on-the-fly analysis and/or as a one-button Run configuration.Enable experimental features (build script & proc macro expansion).Disable features you don't need, for clutter or resource reasons.Disable plugins you don't need, re-check after updates.Tune heap size to avoid GC stalls, free up CPU and RAM elsewhere in your system.We'll do our best to keep these links up to date, but if we fall behind please don't hesitate to shoot us a modmail. This is not an official Rust forum, and cannot fulfill feature requests. Err on the side of giving others the benefit of the doubt.Īvoid re-treading topics that have been long-settled or utterly exhausted. Please create a read-only mirror and link that instead.Ī programming language is rarely worth getting worked up over.īe charitable in intent. If criticizing a project on GitHub, you may not link directly to the project's issue tracker. Post titles should include useful context.įor Rust questions, use the stickied Q&A thread.Īrts-and-crafts posts are permitted on weekends.Ĭriticism is encouraged, though it must be constructive, useful and actionable. For content that does not, use a text post to explain its relevance. Posts must reference Rust or relate to things using Rust. We observe the Rust Project Code of Conduct. Strive to treat others with respect, patience, kindness, and empathy. Please read The Rust Community Code of Conduct The Rust Programming LanguageĪ place for all things related to the Rust programming language-an open-source systems language that emphasizes performance, reliability, and productivity. ![]()
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