--- title: I stopped clearing Windows caches after discovering it... description: Clearing Windows caches is often counterproductive: thumbnail cache, DirectX shader cache, Prefetch, and the %temp% folder all serve legitimate performance... canonical: https://daily.dev/posts/i-stopped-clearing-windows-caches-after-discovering-it-was-silently-costing-me-performance-m5jtfys57 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: I stopped clearing Windows caches after discovering it was silently costing me performance | daily.dev og:description: Clearing Windows caches is often counterproductive: thumbnail cache, DirectX shader cache, Prefetch, and the %temp% folder all serve legitimate performance... og:url: https://daily.dev/posts/i-stopped-clearing-windows-caches-after-discovering-it-was-silently-costing-me-performance-m5jtfys57 og:image: https://api.daily.dev/og/posts/m5JTFYs57.png og:image:alt: I stopped clearing Windows caches after discovering it was silently costing me performance og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # I stopped clearing Windows caches after discovering it was silently costing me performance **[XDA Developers](https://daily.dev/sources/xda-developers)** · 5 min read · 1 upvotes · 0 comments ## Summary Clearing Windows caches is often counterproductive: thumbnail cache, DirectX shader cache, Prefetch, and the %temp% folder all serve legitimate performance purposes, and deleting them just forces Windows and apps to rebuild that data, slowing things down. Clearing these should be reserved for troubleshooting specific problems or reclaiming space when a drive is genuinely full, rather than treated as routine maintenance. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Does clearing the Prefetch folder in Windows actually speed up my PC? No, deleting files in C:\Windows\Prefetch does not meaningfully speed up a PC. Prefetch records which files an application needs at startup so Windows can preload them faster on future launches; deleting it is redundant because Windows simply recreates the files, and frequently used apps will actually start more slowly until the cache rebuilds. _Developers troubleshooting Windows performance myths can find grounded explainers like this one on daily.dev._ ### Is it safe to delete everything in the Windows %temp% folder manually? Manually deleting everything in %temp% is riskier than using Disk Cleanup or Storage Sense, which both skip temporary files modified within the last seven days as a safety rule. Manual deletion ignores that filter, and Microsoft's .NET documentation notes that single-file apps extract into a .net folder inside Temp, forcing them to unpack again on the next launch if deleted. _Anyone weighing manual cleanup against built-in tools can track these nuances on daily.dev._ ### Should I clear the DirectX shader cache or thumbnail cache on Windows 11 to free up space? Generally no, since both serve active performance roles: the DirectX shader cache stores precompiled graphics work so games load and run smoothly, while the thumbnail cache avoids rebuilding image and video previews each time a folder is revisited. Deleting either forces Windows and applications to regenerate the data from scratch, making things slower rather than faster, with little storage reclaimed in return. _Those deciding whether a cleanup tip is worth the performance trade-off can follow deep dives like this on daily.dev._ ## Similar posts on daily.dev - [I stopped using PC optimization apps after learning what actually slows down Windows](https://daily.dev/posts/i-stopped-using-pc-optimization-apps-after-learning-what-actually-slows-down-windows-zha5r4e8x) · XDA Developers · 0 upvotes · 0 comments - [Your Windows SSD is full because of these 6 folders — and most of them are safe to empty](https://daily.dev/posts/your-windows-ssd-is-full-because-of-these-6-folders-and-most-of-them-are-safe-to-empty-2al3jf86o) · XDA Developers · 0 upvotes · 0 comments - [These 5 simple habits make my PC feel much faster](https://daily.dev/posts/these-5-simple-habits-make-my-pc-feel-much-faster-dfezxc9r0) · XDA Developers · 0 upvotes · 0 comments - [Visual Studio Code File and Cache Handling](https://daily.dev/posts/visual-studio-code-file-and-cache-handling-gi2pdaxxu) · Baeldung · 2 upvotes · 0 comments - [I found where Windows keeps files you deleted years ago, and it wasn't the Recycle Bin](https://daily.dev/posts/i-found-where-windows-keeps-files-you-deleted-years-ago-and-it-wasn-t-the-recycle-bin-0gzuz9gur) · XDA Developers · 1 upvotes · 0 comments --- Tags: [#performance](https://daily.dev/tags/performance), [#windows](https://daily.dev/tags/windows) [View this post on daily.dev](https://daily.dev/posts/i-stopped-clearing-windows-caches-after-discovering-it-was-silently-costing-me-performance-m5jtfys57) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"I stopped clearing Windows caches after discovering it was silently costing me performance","url":"https://daily.dev/posts/i-stopped-clearing-windows-caches-after-discovering-it-was-silently-costing-me-performance-m5jtfys57","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/i-stopped-clearing-windows-caches-after-discovering-it-was-silently-costing-me-performance-m5jtfys57"},"datePublished":"2026-10-02T00:03:22.886Z","dateModified":"2026-10-02T00:08:22.879Z","description":"Clearing Windows caches is often counterproductive: thumbnail cache, DirectX shader cache, Prefetch, and the %temp% folder all serve legitimate performance...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/d38f353e343f56f0378b1c876c6cc85e?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/d38f353e343f56f0378b1c876c6cc85e?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"XDA Developers","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"XDA Developers","logo":"https://media.daily.dev/image/upload/s--kCg6yyAP--/f_auto,q_auto/v1774964407/logos/xda-developers?_a=BAMAMiWQ0","url":"https://daily.dev/sources/xda-developers"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/i-stopped-clearing-windows-caches-after-discovering-it-was-silently-costing-me-performance-m5jtfys57","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"performance,windows","timeRequired":"PT5M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"XDA Developers","item":"https://daily.dev/sources/xda-developers"},{"@type":"ListItem","position":3,"name":"I stopped clearing Windows caches after discovering it was silently costing me performance"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/i-stopped-clearing-windows-caches-after-discovering-it-was-silently-costing-me-performance-m5jtfys57#faq","mainEntity":[{"@type":"Question","name":"Does clearing the Prefetch folder in Windows actually speed up my PC?","acceptedAnswer":{"@type":"Answer","text":"No, deleting files in C:\\Windows\\Prefetch does not meaningfully speed up a PC. Prefetch records which files an application needs at startup so Windows can preload them faster on future launches; deleting it is redundant because Windows simply recreates the files, and frequently used apps will actually start more slowly until the cache rebuilds. Developers troubleshooting Windows performance myths can find grounded explainers like this one on daily.dev."}},{"@type":"Question","name":"Is it safe to delete everything in the Windows %temp% folder manually?","acceptedAnswer":{"@type":"Answer","text":"Manually deleting everything in %temp% is riskier than using Disk Cleanup or Storage Sense, which both skip temporary files modified within the last seven days as a safety rule. Manual deletion ignores that filter, and Microsoft's .NET documentation notes that single-file apps extract into a .net folder inside Temp, forcing them to unpack again on the next launch if deleted. Anyone weighing manual cleanup against built-in tools can track these nuances on daily.dev."}},{"@type":"Question","name":"Should I clear the DirectX shader cache or thumbnail cache on Windows 11 to free up space?","acceptedAnswer":{"@type":"Answer","text":"Generally no, since both serve active performance roles: the DirectX shader cache stores precompiled graphics work so games load and run smoothly, while the thumbnail cache avoids rebuilding image and video previews each time a folder is revisited. Deleting either forces Windows and applications to regenerate the data from scratch, making things slower rather than faster, with little storage reclaimed in return. Those deciding whether a cleanup tip is worth the performance trade-off can follow deep dives like this on daily.dev."}}]} ```