Epsilon is not the smallest quantity that can be represented. Its the smallest amount that can be added to a number between 1 and 2. If its added to 2 the resul

Epsilon is not the smallest quantity that can be represented. Its the smallest amount that can be added to a number between 1 and 2. If its added to 2 the result is 2. We need to add 2 * Number.EPSILON to 2 to add anything. 4 * E to 4, 8 * E to 8, 16 * E to 16 etc. That kind of equality test should be: abs( a-b ) < Number.EPSILON * max( abs(a), abs(b) ) In practice I judge the scale of the quantization noise that may accrue and compare the difference to it. It may also be possible to kind of caste precision away by adding a trick value. eg. a + t == b + t If a and b are positive, that is somewhat similar to: abs( a-b ) < Number.EPSILON * t