Run results for: filter vs reduce control

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.109 Safari/537.36

Browser: Chrome 98

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
filter + includes	3907258.0 Ops/sec
reduce + includes	4073749.0 Ops/sec
filter + indexOf	4875776.0 Ops/sec
reduce + indexOf	4577011.0 Ops/sec

Script Preparation code:

var relationships = [{source_ref: "blahblahsighting"},{source_ref: "blahblahsighting"},{source_ref: "blahblahsighting"},{source_ref: "blahblahsing"},{source_ref: "blahblahsing"},{source_ref: "blahblahsighting"}]

Tests:

filter + includes
relationships.filter((relationship) => relationship.source_ref.includes("sighting"))
reduce + includes
relationships.reduce((mem, relationship) => { if (relationship.source_ref.includes("sighting")) { mem.push(relationship) } return mem; }, [])
filter + indexOf
relationships.filter((relationship) => relationship.source_ref.indexOf("sighting") > -1)
reduce + indexOf
relationships.reduce((mem, relationship) => { if (relationship.source_ref.indexOf("sighting") > -1) { mem.push(relationship) } return mem; }, [])

Run results for: filter vs reduce control

filter + includes

reduce + includes

filter + indexOf

reduce + indexOf