Index is a data structure that allows for efficient retrieval of information, much like the index in the back of a book. In the context of software engineering, an index is commonly used to optimize search and query performance in databases, search engines, and other systems that deal with large amounts of data.

How to use it in a sentence

• "We need to add an index on the 'created_at' column of the 'orders' table to speed up our dashboard queries," said the senior engineer, rolling her eyes at the thought of dealing with the outdated database schema.

• The newly-hired developer, eager to impress his teammates, suggested using a bloom filter index to optimize the search functionality, only to be met with blank stares and a sarcastic "Sure, if you want to spend the next two weeks implementing it" from the tech lead.

If you actually want to learn more...

• Real-time full-text search with Luwak and Samza: This article explores the intricacies of indexing queries to enhance search performance, particularly when handling a large volume of queries. It delves into techniques like query decomposition and term extraction to minimize the number of queries executed.

• Paul Graham's Essays : While not directly related to the technical aspects of indexing, Paul Graham's website serves as a prime example of how an index can improve navigation and accessibility for a collection of written content. The consistent structure and links to previous and next entries make it easy to explore his essays.

• Paul Graham's Essays : Another example of Paul Graham's index pages, demonstrating the effectiveness of a well-organized index in helping users find and navigate through a large body of information. It's like having a map in a maze of brilliant ideas.

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