How Search Engines work?
What else?So how is it still faster than your local hard drive? Well, Google isn't the best search engine for no reason! It employs some really efficient algorithms and data structures that help in the quick retrieval of data. Google also has huge 'farm' servers that have index data stored in them. And the computational powers of these machines is immense, nothing like your ordinary desktop microprocessor. So when all these factors add up, you really get a solution that's faster than your Personal Computer's hard drive.
There is a way to speed up search for your hard drive too. Applying the same principle of indexing, we can find files and content much quicker. Windows XP, 7 and 8 have built-in drive managers that give you the option to defragment or index your hard drives. This will optimize your hard drives, and make search much quicker. Windows 7 and onwards has tried to implement this by default too, which is why you can write anything in the search menu search bar, and see results displaying instantaneously. This has been achieved via the Windows Search Index. Hence, indexing is the key to speeding up search results.
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