Run results for: Math.max with nested slice vs iife tracking max (size comp)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.115 Safari/537.36

Browser: Chrome 102

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Math.max(slice()) 1000	508.0 Ops/sec
iife Math.max 1000	6796.8 Ops/sec
Math.max(slice()) 10000	5.8 Ops/sec
iife Math.max 10000	661.0 Ops/sec

Script Preparation code:

var numbers1000 = [...Array(1000)].map((_, i) => Math.floor(Math.random() * (i + 10)))
var numbers10000 = [...Array(10000)].map((_, i) => Math.floor(Math.random() * (i + 10)))

Tests:

Math.max(slice()) 1000
var result = numbers1000.map((v, i, a) => Math.max(v, ...a.slice(0, i)))
iife Math.max 1000
var result = ((prev) => numbers1000.map((v) => prev = Math.max(v, prev)))(-Infinity)
Math.max(slice()) 10000
var result = numbers10000.map((v, i, a) => Math.max(v, ...a.slice(0, i)))
iife Math.max 10000
var result = ((prev) => numbers10000.map((v) => prev = Math.max(v, prev)))(-Infinity)

Run results for: Math.max with nested slice vs iife tracking max (size comp)

Math.max(slice()) 1000

iife Math.max 1000

Math.max(slice()) 10000

iife Math.max 10000