Compinit slow I was never really happy with the shell load time, though. sh now call autoload -Uz compinit & compinit automatically when using zsh. Is there a better way? Just one more thing, FPSWalker seems to lag my program too. Jan 13, 2020 · Noticing the same issue, is there a way to downgrade to earlier commits to validate ? nvm , it was nvm. Not the recommended way to do things, but it would be an option. zcompdump file to see if it must be # regenerated adds a noticable delay to zsh startup. Oct 17, 2012 · The biggest slow down was in the system-wide zshrc file in /etc/zsh. I tracked it down to being something to do with compinit running too much but not sure what step to take next. React will take care of May 27, 2021 · How work the Zsh completion system and how to configure it according to your needs, without any framework or bloated library. let's see why and how we can mitigate the issue Aug 10, 2020 · 不论是在 WSL、Linux 还是 macOS 上，强大的 zsh 一直是我的不二法宝，而 oh my zsh 自然成了最趁手的瑞士军刀，我自己还编写了数个 oh my zsh 插件和主题。直到有一天我突然发现：见鬼，为什么开个 iTerm2 的 Tab 要等上好几秒钟？ Mar 10, 2020 · Overview Changes in v0. 010 total 2、分析具体哪些因素导致变慢 （1）vim . My problem is that it takes around 2 sec for InitializeComponent () [refer 1. In the article, the author was running kubectl in their zshrc. Sep 5, 2019 · In my case, you can see the startup performance improved (check compinit). 5 oh-my-zsh the problem is, terminal load time is too slow about 10 seconds, even for opening new terminal tabs. Ok, I have about 9 000 trees, but the widget is not visible so I don’t understand where is the calculation. Following the advice of the comment and adding skip_global_compinit=1 to my ~/. Am I doing something wrong, or is this just an Jul 2, 2024 · Lately, my shell (zsh) feels slow to use. autoload scans all paths inside fpath, the function lookup list, for paths starting with an underscore. It is my understanding that GetComponent is So instead of just reducing how often a bad thing happens (slow renders), maybe you could eliminate the bad thing and feel free to blink (render) as much as your eyes need you to 😉 How to fix slow renders So we've concluded we want to fix slow renders first. Moreover, Git autocompletion in the Z shell often comes with more powerful features. This solution may be making DX bad by asking devs to do more work, however I think the Oct 14, 2020 · The reason it is slow is because each cell, at a slightly different time, triggers a new render on their own since each setInterval callback gets called individually. This is a neat trick I found. It works perfectly in UE5. Aug 9, 2018 · Three years ago, I switched my shell from bash to zsh. Even booting it for the first time feels like it is slow to render. Executes the ngDoCheck, ngAfterContentChecked, ngAfterViewChecked, and ngOnChanges lifecycle hooks. Jan 31, 2025 · Describe the bug I noticed my shell being slow starting up. 73s system 93% cpu 12. After your debug finished, you can remove related zprof lines (at the beginning/end your ~. May 21, 2017 · Hi, I’d like to display the life of a tree after I hit it. mcornella, How do you know it was nvm? Seems might be my problem as well, since my terminal has been slow to start since installing nvm. I was originally thinking design representations. It shouldn’t happen as I am using a beefy MacBook Pro. Since then, I’ve added a bunch of stuff to my dotfiles and I’ve been getting increasingly annoyed that my shell is slow to load. 31s user 0. Responsive UIs aim for a minimum of 30 fps, ideally achieving 60 fps, meaning each frame should compute within 30 ms or less. Reminder: don't forget to remove those changes from oh-my-zsh. 14s system 47% cpu 0. Calling compinit more than once increases startup time significantly and erases completion functions added programmatically. In this section, we will discuss what you should pay attention to when it comes to performance in a Vue application. zshrc (instead of sourcing . Generating completions can make Zsh slow to open a new shell session, so if you want to get fancy and are worried about performance you could always use caching and compilation to speed things up. I tried solution on this blog post I am using Aceternity UI Svelte, and discorved that this component took a significant amount of time to load, at first I thought it was my code to blame, but then I realized that even the demo on the library's website also took a noticable amount of time to load, I tried the original Aceternity UI lib and it gave the same result, are you experiencing the same issues ? or is it just my device zsh 启动速度慢的终极解决方案 zsh 的交互式体验堪称是最强的——丰富的插件，强大的框架，将 zsh 的交互式体验推向了极致。然而另一方面，过多的插件，臃肿的主题，也让 zsh 变得反应迟钝，反过来破坏了交互式体验。 很多人反映的 zsh 的慢主要体现在两个方面：1. Apr 17, 2021 · autoload -Uz compinit compinit (Note: Many Zsh frameworks & plugin managers include a call to compinit on startup. Hey all, Zsh takes around 3 seconds to open when I open a new tab. yes oh-my-zsh will call compinit for you but its not optimized and its called multiple times (which contributes to slow start up times as its an expensive call). It should be pasted into your own completion file. But I need to use zsh completion anyway. Will using child actors as blueprints within blueprints (as opposed to using another scene component and parenting meshes onto that) affect performance? I plan to add more child actors to Mar 30, 2021 · On Windows, such things can be quite slow e. Squeezing out a little more Aug 22, 2025 · The Data Flow engine detected a slow component in a Data Flow run and has been unable to process the current record for at least 5 minutes. 64% of the startup time. can someone help me understand why my Zsh start up is so slow. Most of it was spent by antigen loading the plugins I use. Discover optimization techniques to improve your app's speed and efficiency. May 20, 2025 · Issue: Inventor has been experiencing significant slowdowns when working with constraints in assembly, particularly with a large number of components. But how do we detect these bottlenecks? Profile the problem Open the React Developer Tools Profiler tab. This doesn't prove zsh is slow. For information about installing the package, see Installation Methods. In this article, Toptal Freelance Software Engineer William Wang walks us through some optimization techniques Oct 25, 2017 · Hello, I have a main blueprint class which holds 4 child actor components. Is there some unfamiliar change that slows down the spline in UE5. Flip side is Dec 9, 2023 · 网上许多 Zsh 的配置教程都是使用 oh-my-zsh 来进行配置， 优点是配置起来简单，对新手友好， 缺点是太过臃肿，拖慢 Zsh 的启动速度。这篇文章记录了我不使用 oh-my-zsh 从零开始配置 Zsh 的过程。 Nov 13, 2022 · Zshrc is slow if you put slow things in it. To address that issue, I created antibody. zshrc (what I gather from your answer is that OMZ runs its own compinit and thus it's unnecessary in my ~/. Something is getting borked initializing Zsh’s much-vaunted completion system. May 29, 2025 · Still in the Gemini session, I asked the LLM to analyze my new profile and explain what compdump and compinit do. 01s system 70% cpu 0. We do not feel that stuff is necessarily loading. When we have an assembly open and try to change a feature of a part the performance of generating this feature is very slow. Optimizing Performance in BlazorIntroduction Blazor is a modern web development framework that allows developers to build interactive and highly-performant web applications using C# and . May 22, 2022 · My first thought was: Do you have some network drives referenced in your zshrc? Or is a network share included in your path? IMHO this is a typical cause for significantly changing execution times. zshrc to see what takes the most time. This is almost always caused by configs that invoke compinit more than once and change something crucial in between the calls. I saw some dotfiles configs that put sourcing file before runnung compinit command, so I’m asking if we prefer to put some source commands before or after run compinit. At least, you won Is it slow in the dev process or in the production as well? If in dev process, I would recommend you to clean your . 1? Thank you The spline I created in the demo map of the Train template sold in the Unreal Aug 20, 2008 · hi due to engineering changes i am finding that it takes hours to substitute a component in NX5. Gemini explained that compdump and compinit are used to set up completions, but it also noted that compdump is used to build a cache file, which shouldn’t be slow every time (even though it was for me). Any ideas of how to to address it? Nov 12, 2022 · So, why is zsh slow to start in the first place? if you run zsh -i -d -f -l which gives you an interactive login shell without interpreting your ~/. The worst part is that You’re not even sure where it’s going wrong. It is rather annoying and a bad user experience. Are items adaptive? Are there sub-assembies in the main assembly? (Break up a huge assembly into sub-assembies, and it may not need to update as much. ) I have a very large 10,000+ part assembly where I only load certain sections of the model depending on where I'm Sep 5, 2024 · The fast device is up to 5x faster than the slow device in Chrome, depending on the technique used, so it is really worth testing applications on slow devices to get an idea of the range of performance. First, let's discuss the two major aspects of web performance: Page Load Mar 23, 2022 · There is a chance that you have encountered a situation that whenever you type something into an input or textarea there is a delay (lagging) and the input update is very slow. We can go further by compiling the dumped file with the built-in command zcompile for faster autoloading of completion functions. png ]. If the performance is the same than sourcing ohmyzsh, then the issue will not be related to ohmyzsh and will be related to the ssh completion. zsh # On slow systems, checking the cached . Feb 5, 2022 · Blazor is a beautiful framework for building SPA's. By then, my shell was taking almost 10 seconds to load. Aug 13, 2018 · Damn it is slow. Posted on Jul 8, 2024 React is Slow? 6 Strategies for Performance Optimisation # javascript # programming # react # webdev Jun 26, 2020 · And, while it wasn't slow, I also dropped zsh-autosuggestions, which brought the shell load time down to about 1. Also look for scopes if things could be imported dynamically and if ISR or SSR is possible. Aug 11, 2022 · Describe the bug Everytime I run the zsh command it will gives me the following error compinit:480: compdump: function definition file not found Steps to reproduce May 25, 2025 · Clicks feel sluggish, page loads are slow, and animations stutter. Oct 6, 2021 · 6 Oct 2021 How to Detect Slow Renders in React? Improving React app performance often comes down to finding bottlenecks and fixing them. Then we can determine whether re-renders are still a problem. it takes over the computer completely and does not let me do anything. The other call might be happening in a different rc file. Disable Unnecessary Startup Programs One of the quickest ways to improve startup speed is by managing the programs that launch at boot. Using Plugins For an easy to use completions plugin I recommend ez-compinit. If you save a copy of, and delete all but one design representation, does it get better? EDIT: I have not worked enough with model states to see what kind of slowdown they may cause. However, the blueprint is so slow that there’s a delay of almost 10 seconds before you see the viewport update after a change is made, making it almost impossible to work with. This behavior is a side effect of using controlled components. 5s to open a terminal feels super slow to me. set -x showed the issue was with a git ls-files command being used to update the branch/dirty text in the prompt for a large repo. Try to create 1000 html elements and add it to the dom and then create 1000 react components and add those. 1. Not when I’m moving forward, just when I want to rotate left or right. However, performance remains satisfactory when dealing with a smaller number of components or constraints. However, there are always challenging scenarios where extra fine-tuning is needed. Apr 11, 2016 · compinit. Why its taking so much time? I want to reduce it to at least 1 sec or less than that , I think its not machine performance problem Jan 25, 2019 · Problem is that with all completion functions start when spawn new shell, it draw shell prompt quite slow. Aug 12, 2024 · Is a memory module defective or is the CPU overheating? Is the hard disk or SSD working at its capacity limit? Or is the application simply slow because it’s pulling data from the internet? Dec 22, 2009 · Hi, I’m using GetComponent to access variables in another script. So, I decided to investigate what is causing the slowness. 5 (Yosemite) zsh 5. The Solution: Optimize compinit to only rebuild the completion cache once per day: Nov 9, 2018 · Okay, so initializing the completion system (i. heh, I think thats the thread where I groked my function. NET. so if you want my personal opinion, ditch oh-my-zsh. 2 秒左右，而且 node、nvm 命令都还能正常使用！打开新 terminal tab 页感受已经好很多。 其他优化 我继续使用 zprof 分析启动时间，再去掉了几个插件，最终剩下的插件如下： Dec 10, 2022 · When I define a static mesh on the spline where I created a long train track, the spline is too slow to be moved anymore. memo, PureComponent, and hooks like useCallback to avoid redundant updates. Jan 24, 2011 · The biggest problem is that compinit was being called a whole bunch of extra times instead of just one time after the fpath was completely defined. Ex: It traverse the hierarchy and adds some components to all transforms with colliders. zcompdump (which can be changed with compinit -d new_dump_file or totally disabled with compinit -D). When using the Move Component command on the small Nov 11, 2022 · Additional Information Notes In the event of a slow-performing or hanging Query component, this can be useful in determining whether the bottleneck is in retrieving data from the source or loading data into the target. 3 days ago · I think this issue is due to the fact UITreeNode class is not using changeDetection: ChangeDetectionStrategy. I have a dynamic kind of prefab that when instantiating adds components to itself. the component that is being substituted is rather larger in size (220Mb). 77 to asdf. I have an assembly with about 200 different simple parts. This brief review outlines the current state of … 1、启动耗时分析 正常启动耗时： time zsh -i -c exit zsh -i -c exit 3. My shell went from almost 10 seconds to ~2 seconds. big with 6 holes and filleted corners). So I don’t have to mess around with components every time I change my prefab structure. To puts things in perspective , its almost 9 times slower than ra Raw compinit-oh-my-zsh. Thanks, Chris React is pretty slow, you could use a ref and render the list manually in a custom hook. put plenty of static content on the index page to distract the user (or prerender if you have a server) make sure you do not enable AOT compilation - it will increase the size lazy load as much of the compiled app as possible (improve initial startup) don't use loads of third party libraries that add additional size Make sure you Feb 5, 2020 · 0 vscode dev container terminal prompt was being slow for me, taking several seconds to return to prompt after completing any command. zshrc, you’ll see that zsh starts nearly instantaneously, though without any customizations. png ] after that. But for that we have to keep our code performant. This has the following issues: The compinit command should only be called once per shell startup in zsh compinit is often called Oct 8, 2023 · Issue: Inventor slow performance in large multibody part when updating or editing existing features for next revision. 10 system the slow down is the call to compinit on the second-to-last line. There is one physiological item you want slow. This little hack restricts # it to once a day. due to "fork/exec" not being windows-native, or by something slowing down the "git" command itself. sh when you're done timing your plugins. You might want to make your users aware of this, to save yourself needless bug reports. If the main thread is blocked, the user interface becomes unresponsive, resulting in a drop in frames per second (fps). So how to manually trigger to load/ source completion functions? Even I know I already in . Hi, why Ohmyzsh is really slow, the prompt takes a long time to show up. One well-placed memoization can make a slow app fast again. All of these four child actors are assigned actor blueprints (which have several static meshes and are reused in other blueprints). The assembly contains 1 constraint which is a Touch Align constraint between the large and small block. Any ideas on where I should look to see what could be causing issues? Thanks. Dec 2, 2023 · Here are some techniques you can employ to make things better. Sep 30, 2024 · The Problem: Zsh’s completion system checks for new completions on every startup, which can be slow. 启动速度，2. This guide breaks down the most common problems and how to solve them: Unnecessary re-renders: Use React. 10. Even on Linux, I prefer a stripped down "shell-only" variant for performance. Does anyone have any advise on where to start looking? I'm… Dec 2, 2015 · Would anyone have insight into the workings of an NX assembly in regards to what may slow down the model response in regards to interacting with the model (rotation, zooming, etc. prompt 反应速度慢 May 17, 2016 · I’m working with blueprints that have thousands of components, and I need the construction script to change which components are visible whenever the actor is moved. # # The globbing is a little complicated here: Jan 30, 2025 · Applying my skills in performance optimization in a new domain: terminal (zsh) startup speed. Sometime the network might be slow or even down. Instantiating components is slow, op's question relates directly to that. Jul 23, 2025 · Slow React Application Rendering may occur due to heavy components, images, bad code practices unnecessary renders due to changes in states. Apr 10, 2016 · This is the story on how I speed up my terminal load time. Interact with the part of your app that feels slow Dec 30, 2023 · A slow JavaScript module can potentially block the main thread. next and remove the lock file and reinstall stuff again. This problem can be reduced by code splitting, avoiding unnecessary re-renders and memoization. Click the record button to start profiling. Aug 18, 2023 · Why does a React web app run slow? The answer often lies in when and how frequently your components re-render, and whether those re-renders were even necessary. The completion system (compinit) is zsh’s built-in command completion - it’s what shows possible completions when you hit tab. zshrc) in order to stop printing debug information. I have a list of links in the nav. TL:DR: The performace of GetComponent varies between editor and build, and whether or not the component is found, but it isn't necessarily slow. I want to change a fillet of a very simple floorplate (just a square sheetmetal plate 350x350x10 mm. Better, but still too slow. g. Obviously I want to keep oh-my-zsh and my plugins, but >0. We will also cover some more advanced use cases. This snippet was useful in situations where filesystem access was slow -- such as cygwin with an HDD. zsh # compinit optimization for oh-my-zsh # On slow systems, checking the cached . Your vo2 slow component. Large Aug 1, 2013 · Hello all, Please see the attached image to visualize the issue. Jun 21, 2020 · As i have already stated in question , zsh shell is taking abnormally long time to start up. oh-my-zsh. 26s user 8. One advantage is that those SPA's feel like native applications. BTW I believe `-C` will disable some cache checking, caching is enabled by default > To speed up the running of compinit, it can be made to produce a dumped configuration that will be read in on future invocations; this is the default, but can be turned off by calling compinit with the option -D. kubectl was slow. First image: An assembly consisting of a large block and a small block. Nothing is free, performance-wise But if you want someone to tell you if “X” is fast/slow in absolute terms then you won’t get an answer. Performance issues in React - like slow page loads, unresponsive UIs, and laggy interactions - can frustrate users and hurt your business. We could remove the index file and import the icon components individually; and add a note in docs letting people know why this is done and also that they can create their own index file (only for the icons that they use). In a recent post about optimization quite a lot of people asked the OP how they had made their game faster, and other commenters suggested that they might have cached the results of calls to GetComponent (). But once you do that, you may be much better off using a plugin built to do this. In the screen below, I tried to create a The V·O₂ slow component, a slowly developing increase in V·O₂ during constant-work-rate exercise performed above the lactate threshold, represents a progressive loss of skeletal muscle contractile efficiency and is associated with the fatigue process. 949 total One second may not sound like a lot, but it meant that every time I opened a new terminal tab, my shell prompt wouldn’t show up Jan 17, 2022 · If you add autoload -U compinit && compinit to your . Oddly git ls-files itself wasn't slow. ) compinit will then automatically pick up your completion functions It was so painfully slow working for a while, until I suppressed that sketch and it all sped way up. **Problem #1: Unnecessary Re-renders Are Sneaky **One of the most common reasons React apps become sluggish is because components re-render more often than they need to. I went through and disabled the plugins I didn't use much and got my shell load time down. 0. To do that, I created an actor blueprint composed with a simple tree shape, and a widget component hidden at start. Another thing I've thought about a lot lately is hardware temperatures and throttling of performance. git repo, I still want manually load completion function before use it, the cost of slow shell spawn is higher than the completion itself. A Note on Profiling with zsh/zprof To speed up the running of compinit, it can be made to produce a dumped configuration that will be read in on future invocations; this is the default, but can be turned off by calling compinit with the option -D. React doesn’t promise magical performance gains, but it provides just the right tools and functionalities to make it easy. Jun 4, 2021 · How to troubleshoot a slow re-render in Blazor; how to get the render time of each component? Asked 4 years, 5 months ago Modified 4 years, 5 months ago Viewed 5k times Apr 19, 2025 · Basic Usage Relevant source files This page explains how to use the zsh-completions package after installation, including configuration and everyday usage. Once it does get to the page, it loads Oct 20, 2020 · 我使用的第二种方案， 瞬间 zsh 启动速度提高了 1. e. The problem is I have an important lag when I add my health widget. The Data Flow engine will continue to process the record as an interruption Nov 11, 2023 · WHy is it so slow?I think this speed issue results in a bad developer experience. Clean the caches of yarn or bun whatever you are using. , all of the items with names beginning with “comp”) is taking a combined 99. The issue is zsh shell is taking abnormally long time to start up. # # The globbing is a little complicated here: Feb 1, 2025 · According to JonLuca’s research, this can cut the load time in half! The auto-updates are nice, but I’d rather do them manually when I want to. The changes have been discussed on github and they seem to be working well for a few people. Jul 6, 2024 · $ autoload -Uz compinit && compinit compinit is a script with a shell function that initializes autocompletion. zshenv bought me over one full second. Instead of having an interval per cell, lift up the state to the parent component, do one single interval and update of the whole dataset, then render down the actual tree with the resulting data once. 836 total 简洁模式： time zsh --no-rcs -i -c exit zsh --no-rcs -i -c exit 0. So I redefine my fillet Apr 23, 2019 · Hi I have added one RibbonControl in UserControl1 and added BarButtonItem,BarCheckItem etc in that. But it also meant that my shell took a fair amount of time to start up, around 1 second: 1 2 3 $ time zsh -i -c exit zsh -i -c exit 0. 00s user 0. In this article, we’ll explore 14 common React performance mistakes and how to Dec 28, 2020 · Fantastic, thank you! I removed the manual compinit from my ~/. Nov 12, 2025 · Compinit's cache rebuilding mechanism works by counting the number of completion definitions and rebuilding the cache if that number has changed. As the number of points increases, the slowness increases. Unfortunately when my prefabs are created I got noticeable hiccups Sep 13, 2025 · Blazor Performance: Optimizing App Tips for Maximum Efficiency Master Blazor performance with expert tips on optimization, enhancing speed and responsiveness in your apps. zshrc has grown to include many tricks & tools I rely on daily. And around 2 sec to come to UserControl1_Loaded method [refer 2. 1. Compinit is one of main reason to slow down z-shell startup. I tested with running compinit before and after sourcing files and check the performance, compinit will cost most if I run Jul 18, 2024 · Over the years, my . The framework is based on WebAssembly, a binary instruction format for a stack-based virtual machine that runs in modern web browsers, enabling Blazor to execute C# code directly in the browser without Building my first next. I made those changes on my branch of oh-my-zsh on github. 16 votes, 17 comments. When I click on a link which goes to a page using SSR to fetch prisma data, there is a delay of about 2 secs after clicking the link before the browser does anything. On my Ubuntu 10. js website and thought I understood the different rendering methods but am now a bit confused… I’m using prisma and tailwind. zshrc), and ran chmod g-w,o-w on the two directories returned by compaudit, now the warning is gone. Sources: README. On this page Identifying slow computations Optimizing slow computations Identifying slow computations You can identify heavy May 17, 2022 · Spin-up the profiler Try doing a loop with a lot of GetComponent calls Look at the performance results on your machine (s)/device (s) Ensure you read a component and store the reference to it away rather than constantly retrieving it. It was a huge step May 4, 2025 · Learn to identify and fix React performance issues. Some time ago I shared my dotfiles to the world. I read somewhere that it was “relatively” slow. 0 but extremely slow in UE5. A single slow computation within a template or a lifecycle hook can slow down the entire change detection process because Angular runs the computations sequentially. No need to do any fancy pareto analysis here. Example if I unzip a large file, the speed graph on the SSD starts super speedy but then some seconds in it's about 5% of the initial speed. My Zsh takes up to six 6 seconds to start up so I added zmodload zsh/zprof and zprof to my . This guide will highlight some of the techniques to keep your Blazor app running smoothly. sh, that does this in a more sophisticated way) you'll have it. Jul 23, 2018 · The default dumped file is . Jan 25, 2025 · Table of Contents React apps feeling slow? Here’s how to fix it. Jul 8, 2024 · Nik L. I also don’t don’t use any other zsh plugin other than git. 10 seconds. Sep 14, 2020 · Distance runners generally like fast things such as pace. Jun 21, 2020 · I am currently using ubuntu 20 and using zsh + oh my zsh shell . zshrc 开启可以用来分析zsh启动耗时 zmodload zsh/zprof (2)执行命令 ~ zsh ~ zprof num calls May 6, 2010 · I am using: Mac OS X 10. I would like to clear it again that delay in zsh only happens when opening terminal at start , not durin Dec 18, 2024 · These pitfalls can result in slow applications, poor user experiences, and frustrated developers debugging issues. OnPush so components become slow because lots of dragover events are thrown by the browser and this trigger refresh on the component DOM. md 10-11 Post-Installation Configuration After installing zsh-completions, you need to configure your shell to use the provided completion functions Hey guys, I'm currently using the component editor to mass-fix vertices moving when they shouldn't when my rig moves, but it's taking so long to load… Hi, We use Siemens NX2206 with Teamcenter 14. Dec 30, 2024 · Steps to Fix Slow PC Startup Now that we understand the potential causes of slow startup, let’s take a closer look at how to fix these issues step by step. Performance Overview Vue is designed to be performant for most common use cases without much need for manual optimizations. i am running a 64 bit dual processor computer. After debugging source files I found that the problem was in the oh my zsh source file and that the line that initializes the completion May 16, 2018 · Profile functions The plugin command-not-found was the main slow down of Oh-My-Zsh. poifl kbaopphf xck iuda nelkyq zljetedwi retaqkca lguaxik ukguh hsh fmyru bodq zwsq bods ofqa