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⚡️ Speed up function pipeline by 66% #308

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⚡️ Speed up function pipeline by 66% #308

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9 changes: 8 additions & 1 deletion js/src/dataTransform.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,14 @@ interface Transformer<TInput, TOutput> {
}

function pipeline<T>(value: T, ...fns: Array<(arg: T) => T>): T {
return fns.reduce((acc, fn) => fn(acc), value);
// Fast path for no functions
if (fns.length === 0) return value;

let result: T = value;
for (let i = 0, len = fns.length; i < len; ++i) {
result = fns[i](result);
}
return result;
}

function groupBy<T>(items: T[], keyFn: (item: T) => string): Record<string, T[]> {
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