mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-11-08 08:44:37 +08:00
Chris Tate
0ba86b289a
- Speed up string-keyed collections and wide object property lookup. - Share scalable numeric-key ordering across typed and checked objects. - Preserve property, iteration, and ownership behavior across native and WASI targets.
25 lines
979 B
TypeScript
25 lines
979 B
TypeScript
const record: Record<string, number> = {};
|
|
for (let i = 96; i >= 0; i--) record[String(i)] = i;
|
|
for (const key of ["word", "01", "4294967295", "4294967294", "-0", "", "a\0b", "é😀"]) record[key] = 100;
|
|
console.log(Object.keys(record).join("|"));
|
|
console.log(Object.values(record).join("|"));
|
|
console.log(Object.entries(record).map(([key, value]) => key + ":" + value).join("|"));
|
|
const map = new Map<string, number>();
|
|
for (let length = 0; length <= 40; length++) {
|
|
const prefix = "same-prefix-".repeat(length);
|
|
for (const tail of ["a", "b", "\0", "é", "😀"]) map.set(prefix + tail, length);
|
|
}
|
|
let sum = 0;
|
|
for (const [key, value] of map) {
|
|
const copy = ("!" + key).slice(1);
|
|
console.log(map.has(copy), map.get(copy), value);
|
|
sum += map.get(copy)!;
|
|
}
|
|
console.log(map.size, sum);
|
|
for (let i = 0; i < 200; i++) {
|
|
const key = "churn-" + i;
|
|
map.set(key, i);
|
|
if (i >= 7) map.delete("churn-" + (i - 7));
|
|
}
|
|
console.log(Array.from(map.keys()).slice(-7).join("|"));
|