Run results for: string array duplicates

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36 Edg/107.0.1418.56

Browser: Chrome 107

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
helper function	51829.4 Ops/sec
all in one	48193.2 Ops/sec

Tests:

helper function
function dup(str) { function removeDuplicateLetters(word) { return word .split("") .filter((letter, index, arr) => letter !== arr[index - 1]) .join(""); } return str.map((word) => removeDuplicateLetters(word)); } console.log( dup(["abracadabra", "allottee", "assessee"]), ` => ["abracadabra","alote","asese"]` ); console.log(dup(["kelless", "keenness"]), ` => ["keles","kenes"]`); console.log(dup(["hello", "world"]), ` => ["helo", "world"]`); console.log(dup(["hi", "world"]), ` => ["hi", "world"]`); console.log(dup([]), ` => []`);
all in one
function dup(str) { return str.map((word) => word .split("") .filter((letter, index, arr) => letter !== arr[index - 1]) .join("") ); } console.log( dup(["abracadabra", "allottee", "assessee"]), ` => ["abracadabra","alote","asese"]` ); console.log(dup(["kelless", "keenness"]), ` => ["keles","kenes"]`); console.log(dup(["hello", "world"]), ` => ["helo", "world"]`); console.log(dup(["hi", "world"]), ` => ["hi", "world"]`); console.log(dup([]), ` => []`);