Run results for: Bitwise vs String feature flags

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:63.0) Gecko/20100101 Firefox/63.0

Browser: Firefox 63

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
Bitwise - Existing	107481300.0 Ops/sec
Bitwise - Non-Existing	107021800.0 Ops/sec
String - Existing	15769630.0 Ops/sec
String - Non-Existing	19957430.0 Ops/sec

Script Preparation code:

var BITWISE_FEATURE_A = 1;
var BITWISE_FEATURE_B = BITWISE_FEATURE_A<<1;
var BITWISE_FEATURE_C = BITWISE_FEATURE_B<<1;
var BITWISE_ENABLED = BITWISE_FEATURE_A ^ BITWISE_FEATURE_C;

var STRING_FEATURE_A = "yellow_scrollbar";
var STRING_FEATURE_B = "green_box";
var STRING_FEATURE_C = "blue_banner";
var STRING_ENABLED = STRING_FEATURE_A + STRING_FEATURE_C;

Tests:

Bitwise - Existing
BITWISE_ENABLED & BITWISE_FEATURE_A === BITWISE_FEATURE_A
Bitwise - Non-Existing
BITWISE_ENABLED & BITWISE_FEATURE_B === BITWISE_FEATURE_B
String - Existing
STRING_ENABLED.indexOf(STRING_FEATURE_C) !== -1
String - Non-Existing
STRING_ENABLED.indexOf(STRING_FEATURE_B) !== -1

Run results for: Bitwise vs String feature flags

Bitwise - Existing

Bitwise - Non-Existing

String - Existing

String - Non-Existing