[Solved] How to Improve System Speed – Clearing Cache

Table of Contents

Cache – What is it?

A cache is a temporary storage layer that keeps copies of data that’s likely to be needed again soon. Its whole purpose is to avoid repeating expensive work — like downloading data, recalculating results, or reading from slower storage.

Most people hear “cache” and immediately think, “technical computer stuff.” But caching is actually one of the simplest ideas in technology. You already use the same principle in everyday life without realizing it.

Think about your kitchen. If you cook often, you probably keep frequently used ingredients nearby — salt, oil, spices, maybe your favorite pan. You don’t store them in some distant room every single time you need them. That would slow everything down.

Your computer does exactly the same thing. Cache is basically the system saying: “You use this a lot. Let me keep it close.” And when that happens, everything feels fast.

Your browser is one of the biggest users of cache. The first time you visit a website, your device downloads all sorts of things: images, fonts, buttons, scripts, animations, etc. But downloading the same files over and over again would be wasteful. So your browser keeps copies temporarily. That’s why websites like YouTube, Instagram, or X (Twitter) usually load faster after the first visit. Your device already remembers part of them.

Your phone uses cache too.

Ever notice how apps you use daily open almost instantly, while apps you haven’t touched in months feel slower? That’s because your phone keeps recent app data nearby. It assumes, correctly most of the time, that you’ll probably use those apps again soon.

Streaming services do the same thing.

When you watch a video on Netflix or listen to music on Spotify, tiny chunks of data are cached ahead of time. That’s what buffering really is: preparing future moments before you reach them. Without cache, streaming would feel like reading a book where every page had to be printed before you could turn it.

Even your processor — the brain of your computer — depends heavily on cache.

Modern CPUs are absurdly fast. But there’s a problem: retrieving data from regular memory takes comparatively longer. So processors keep tiny ultra-fast storage areas called L1, L2, and L3 cache. If the processor finds what it needs there, it’s called a cache hit.

But there are downsides to caching too, cache can sometimes make things worse. You’ve probably experienced this without realizing it. Maybe a website looked broken even after an update. Maybe an app kept showing old information. Maybe you logged out and couldn’t log back in properly until you cleared cache. That happens because cache is based on memory, and memory can become outdated.

This is also why “clear cache” has become one of the universal solutions in tech support. This is not because cache is bad — but because sometimes the shortcut becomes the problem.

There’s another twist. Too much cache can slow things down too. At first, this sounds ridiculous. Isn’t cache supposed to improve speed? Yes! But let's explain it this way.

Think of a desk.

A few important tools on your desk help you work faster. But if the desk becomes buried under papers, chargers, notebooks, cables, empty cups, and random receipts, you stop working efficiently. You spend more time searching than doing.

Devices experience something similar. Large caches can:

• eat storage
• crowd memory
• slow lookups
• force the system to constantly reorganize itself

This happens a lot on older phones. Some apps quietly accumulate gigabytes of cached data over time. Eventually the very thing designed to speed things up starts suffocating the device. And here’s the funny part: when you clear cache, things may temporarily become slower again.

Why?

Because the system has to rebuild everything from scratch. Websites need to re-download assets. Apps need to recreate temporary files. Streaming services need to buffer again. The device has to “relearn” what matters. So if your browser feels slightly slower right after a cleanup, that’s normal.

With all that said, let's clear some cache.

Clearing Web Browser Cache

Google Chrome

Desktop (Windows/macOS):

1. Open Chrome.
2. Click the three dots ⋮ in the top-right corner
3. Choose More tools
4. Choose Clear browsing data.
5. In the popup:
• Time range: Choose “All time” to clear everything.
• Check: Cached images and files (you can also check Cookies if desired).
6. Click Clear data.

Mobile (Android/iOS):

1. Open Chrome
2. Tap the three dots ⋮
3. Tap History
4. Tap Clear browsing data.
5. Select Cached images and files, set time range, then tap Clear data.

Apple Safari

macOS:

1. Open Safari
2. Choose Safari menu
3. Choose Preferences
4. Choose Advanced
5. Check Show Develop menu in menu bar.
6. From the menu bar
7. Choose Develop
8. Choose Empty Caches.

iOS (iPhone/iPad):

1. Open Settings
2. Tap Safari
3. Tap Clear History and Website Data.
4. Confirm to clear cache, cookies, and browsing history.

Microsoft Edge

Desktop:

1. Open Edge
2. Click the three dots ⋯ 
3. Click Settings
4. Click Privacy, search, and services.
5. Under Clear browsing data, click Choose what to clear.
6. Select Cached images and files, then Clear now.

Mobile (Android/iOS):

1. Open Edge
2. Tap the three dots
3. Tap Settings
4. Tap Privacy
5. Tap Clear browsing data.
6. Select Cached images and files, then tap Clear.

Mozilla Firefox

Desktop:

1. Open Firefox
2. Click the three lines ≡
3. Click Settings
4. Click Privacy & Security.
5. Scroll to Cookies and Site Data
6. Click Clear Data
7. Click Cached Web Content
8. Click Clear.

Mobile (Android/iOS):

1. Open Firefox
2. Tap three lines ≡
3. Tap Settings
4. Tap Data Management.
5. Enable Cache, then tap Clear Private Data.

Samsung Internet

Mobile (Android):

1. Open Samsung Internet
2. Tap the three lines ≡
3. Tap Settings
4. Tap Privacy
5. Tap Delete browsing data.
6. Select Cached images and files and tap Delete.

2. How to Clear App Cache on Android

1. Open Settings
2. Tap Apps (or Apps & notifications).
3. Select the app
4. Tap Storage
5. Tap Clear Cache.
6. Repeat for any app that may be slow or storing excessive temporary data.

3. How to Clear System Cache

Android

(System cache partition, useful for performance issues, no personal data deleted)

1. Turn off your device.
2. Press and hold Volume Up + Power + Home/Bixby (varies by device) to enter Recovery Mode.
3. Navigate with volume buttons
4. Select Wipe Cache Partition
5. Confirm.
6. Reboot the device.

macOS

(Clearing system cache safely)

1. Open Finder → Go → Go to Folder.
2. Type ~/Library/Caches → delete contents of folders (don’t delete the folders themselves).
3. Optionally, repeat with /Library/Caches for system-wide caches.
4. Restart your Mac.

iOS

(iPhone/iPad doesn’t allow manual system cache clearing, but you can refresh system storage)

1. Restart your device (clears temporary cache).
2. For deeper cleaning:
• Tap Settings
• Tap General
• Tap iPhone Storage
• Tap Offload unused apps.

Windows

1. Press Windows + R
2. Type %temp% or just temp
3. Hit Enter.
4. Delete all files in the folder.

Or Use Disk Cleanup tool

1. Search “Disk Cleanup”
2. Select drive
3. Check Temporary files
4. Click OK.