Run results for: If statements vs zero multiplication and assignment

Is it faster to check if a numeric calculation needs to be performed and assigned to an object property, or just do the calculation against zero and assign it anyway.

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36

Browser: Chrome 64

Operating system: Mac OS X 10.11.6

Device Platform: Other

Date tested: 2024 years ago

Test name	Executions per second
If Statement - True	2245036.0 Ops/sec
If Statement - False	8790968.0 Ops/sec
Calculate - Positive	2879747.0 Ops/sec
Calculate - Zero	3031487.0 Ops/sec

Script Preparation code:

var DO_MATHS_TRUE = true,
    DO_MATHS_FALSE = false,
    DELTA = 12345,
    OBJ_SRC = {x: 12},
    OBJ_SRC_ZERO = {x: 0},
    OBJ_DEST = {x: 0};

Tests:

If Statement - True
if(DO_MATHS_TRUE){ OBJ_DEST.x += (OBJ_SRC.x * DELTA) }
If Statement - False
if(DO_MATHS_FALSE){ OBJ_DEST.x += (OBJ_SRC.x * DELTA) }
Calculate - Positive
OBJ_DEST.x += (OBJ_SRC.x * DELTA)
Calculate - Zero
OBJ_DEST.x += (OBJ_SRC_ZERO.x * DELTA)

Run results for: If statements vs zero multiplication and assignment

Is it faster to check if a numeric calculation needs to be performed and assigned to an object property, or just do the calculation against zero and assign it anyway.

If Statement - True

If Statement - False

Calculate - Positive

Calculate - Zero