Run results for: lowercase VS 2if v2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 YaBrowser/20.3.1.195 Yowser/2.5 Yptp/1.23 Safari/537.36

Browser: Yandex Browser 20

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
lowercase	2713403.5 Ops/sec
2if	1562116.4 Ops/sec
1 not if	3142056.5 Ops/sec
dict	2265617.5 Ops/sec
set	3012513.2 Ops/sec
not not	6960803.0 Ops/sec
Boolean	3433212.8 Ops/sec

Script Preparation code:

x = {a:'AAAA',b:'BBBB', c:'aaaa'};
y = {v:'aCaca'};
z = {[x.a]:true,[x.c]:true}
s = new Set([x.a,x.c]);

Tests:

lowercase
y.v.toLowerCase().includes(x.c)
2if
y.v === x.a || y.v === x.c
1 not if
y.v !== x.b
dict
!!z[y.v]
set
s.has(y.v)
not not
!!(y.v)
Boolean
Boolean(y.v)

Run results for: lowercase VS 2if v2

lowercase

2if

1 not if

dict

set

not not

Boolean