People keep getting confused while using terms “Performance” and “Scalability”. Here’s the difference:
Performance measures the speed with which a single request can be executed. Example: My website’s home page loads completely in 2 seconds, this is performance.
Scalability measures the ability of a request to maintain its performance under increasing load. Example: My website’s home page should load completely in 2 seconds even with more users requesting for it. Means same performance with more users using the resource.
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