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How does the GLFW time acquirement function differ from Java’s built-in time getters?

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glfwGetTime() and System.nanoTime() both claim to provide precision-based time interval management based on the host platform’s highest resolution and accuracy clock.

Naturally, I will only use one of them, so which one should I rely on?

How do they differ, and how do their differences play out in time-sensitive calculations such as a runloop?

Possibly I should use both, but in different contexts?

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glfwGetTime() returns a double while System.nanoTime() returns a long.

If your calculations are time sensitive, you don't want to use a double - integer math is generally much faster.

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