What is a cache? A complete guide to caches and their important uses on your computer, phone, and other devices

The cache is an important part of your computer.
The cache is an important part of your computer.

Crystal Cox/Business Insider

  • A cache is a special storage space for temporary files that makes a device, browser, or app run faster and more efficiently. 

  • After opening an app or website for the first time, a cache stashes files, images, and other pertinent data on your device.

  • Cached data is used to quickly load an app or website for every subsequent visit.

  • Visit Business Insider’s Tech Reference library for more stories.

If you’ve ever troubleshooted something on your computer or cleaned up your browsing history, you’ve most likely come across advice related to the cache (pronounced “cash”). 

Most likely, you’ve been prompted to clear it. 

But what is a cache, and why would you want to do that? Here’s everything you should know about caches and why they’re crucial to modern technology. 

What is a cache?

A cache is

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Is Ciena (CIEN) Stock Outpacing Its Computer and Technology Peers This Year?

Investors focused on the Computer and Technology space have likely heard of Ciena (CIEN), but is the stock performing well in comparison to the rest of its sector peers? One simple way to answer this question is to take a look at the year-to-date performance of CIEN and the rest of the Computer and Technology group’s stocks.

Ciena is one of 607 individual stocks in the Computer and Technology sector. Collectively, these companies sit at #9 in the Zacks Sector Rank. The Zacks Sector Rank considers 16 different groups, measuring the average Zacks Rank of the individual stocks within the sector to gauge the strength of each group.

The Zacks Rank is a proven model that highlights a variety of stocks with the right characteristics to outperform the market over the next one to three months. The system emphasizes earnings estimate revisions and favors companies with improving earnings outlooks. CIEN

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Has Fortinet (FTNT) Outpaced Other Computer and Technology Stocks This Year?

Investors focused on the Computer and Technology space have likely heard of Fortinet (FTNT), but is the stock performing well in comparison to the rest of its sector peers? A quick glance at the company’s year-to-date performance in comparison to the rest of the Computer and Technology sector should help us answer this question.

Fortinet is a member of our Computer and Technology group, which includes 607 different companies and currently sits at #9 in the Zacks Sector Rank. The Zacks Sector Rank gauges the strength of our 16 individual sector groups by measuring the average Zacks Rank of the individual stocks within the groups.

The Zacks Rank is a proven model that highlights a variety of stocks with the right characteristics to outperform the market over the next one to three months. The system emphasizes earnings estimate revisions and favors companies with improving earnings outlooks. FTNT is currently sporting

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Dfinity opens its long-anticipated ‘internet computer’ to third-party developers

Dfinity, the much-hyped and long-anticipated blockchain project whose creators say will be the basis of a decentralized “internet computer,” is now open to third-party developers.

Dominic Williams, Dfinity’s founder and chief scientist, said during a live-streamed launch event that today’s “Tungsten release” is the third of five “public milestones,” the fifth of which will be the culmination of the full internet computer sometime “later this year.”

Dfinity raised $102 million in a 2018 funding round led by Andreessen Horowitz. In total, it has raised more than $160 million.

“One of the biggest problems emerging in technology is the monopolization of the internet by Big Tech — companies that have consolidated near-total control over our technologies,” Williams said in a statement. Dfinity uses a blockchain-based protocol to weave together computing capacity from a decentralized network of data centers. The goal is to shift the power back to developers aiming to build

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Britons are being put at risk of cyber crime by ‘outdated’ computer laws that thwart investigators

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Britain’s computer users are at greater risk of cyber-attack because “outdated” laws mean investigators are required to ask criminals and rogue states permission to interrogate their systems.

Leaders of Britain’s multi-billion pound tech industry have today (Mon) written to Boris Johnson urging him to rewrite the 30-year-old computer misuse act to provide tech firms with legal cover to help GCHQ and other Government agencies counter cyber attacks.

They say the “outdated” law was designed to protect telephone exchanges when only one in 200 (0.5 per cent) of people and has now been overtaken by highly sophisticated cyber criminals who are running rings round investigators who have “one arm tied behind their backs.”

There are 4.6 million online crime incidents every year mainly related to fraud but also including malware, hacking and sophisticated attacks by organised crime or rogue nations.

They cite Section One of the act which prohibits the

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