Flooring Floats with Bitwise OR: Faster Than Math.floor()?

Flooring Numbers with Bitwise OR 0

A unique method has surfaced for flooring float numbers using a bitwise OR operator:

var a = 13.6 | 0; // a == 13

Let's delve into this technique, exploring its mechanisms and comparing it to the standard Math.floor function.

How Does It Work?

Bitwise operations operate on signed 32-bit integers. Therefore, applying a bitwise OR to a float number effectively converts it to an integer, truncating the fractional part.

Advantages Over Math.floor?

Benchmarking results suggest that this method can be marginally faster than Math.floor.

Disadvantages:

• May not pass JavaScript linting checks
• Limited to 32-bit signed integers

• Comparative behavior differs from Math.floor:

  • Math.floor(NaN) === NaN
  • (NaN | 0) === 0

The above is the detailed content of Flooring Floats with Bitwise OR: Faster Than Math.floor()?. For more information, please follow other related articles on the PHP Chinese website!