Pre-calculation is a very useful and neat programming trick that will allow you to “squeeze” more processing power out of your hardware.

In its simplest form, it involves only three easy steps :

• Step 1: do often-used and/or complex computations only once per run (for example, during application start-up)
• Step 2: keep the results of the computations in memory
• Step 3: from that point on, wherever needed, use these results instead of re-doing the computations

In this tutorial I will show you how to effectively use pre-calculation to considerably speed up your code.

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