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⚡ Snowflake generate improve performance with BigInt

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This commit is contained in:
Flam3rboy 2021-01-31 00:20:37 +01:00
parent d2795bdd0a
commit ddfa1de983
1 changed files with 10 additions and 34 deletions
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44
src/util/Snowflake.ts
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@ -10,10 +10,10 @@
* A container for useful snowflake-related methods. * A container for useful snowflake-related methods.
*/ */
export class Snowflake { export class Snowflake {
static EPOCH = 1420070400000; static readonly EPOCH = 1420070400000n;
static INCREMENT = 0; static INCREMENT = 0n; // max 4095
static processId = 0; static processId = 0n; // max 31
static workerId = 0; static workerId = 0n; // max 31
constructor() { constructor() {
throw new Error(`The ${this.constructor.name} class may not be instantiated.`); throw new Error(`The ${this.constructor.name} class may not be instantiated.`);
@ -82,27 +82,12 @@ export class Snowflake {
return dec; return dec;
} }
/** static generate() {
* Generates a Discord snowflake. var time = BigInt(Date.now() - Snowflake.EPOCH) << 22n;
* <info>This hardcodes the worker ID as 1 and the process ID as 0.</info> var worker = Snowflake.workerId << 17n;
* @param {number|Date} [timestamp=Date.now()] Timestamp or date of the snowflake to generate var process = Snowflake.processId << 12n;
* @returns {Snowflake} The generated snowflake var increment = Snowflake.INCREMENT++;
*/ return (time | worker | process | increment).toString(10);
static generate(timestamp = Date.now()) {
if (timestamp instanceof Date) timestamp = timestamp.getTime();
if (typeof timestamp !== "number" || isNaN(timestamp)) {
throw new TypeError(
`"timestamp" argument must be a number (received ${isNaN(timestamp) ? "NaN" : typeof timestamp})`
);
}
if (Snowflake.INCREMENT >= 4095) Snowflake.INCREMENT = 0;
let workerBin = Snowflake.workerId.toString(2).padStart(5, "0");
let processBin = Snowflake.processId.toString(2).padStart(5, "0");
const BINARY = `${(timestamp - EPOCH)
.toString(2)
.padStart(42, "0")}${workerBin}${processBin}${(Snowflake.INCREMENT++).toString(2).padStart(12, "0")}`;
return Snowflake.binaryToID(BINARY);
} }
/** /**
@ -138,13 +123,4 @@ export class Snowflake {
}); });
return res; return res;
} }
/**
* Discord's epoch value (2015-01-01T00:00:00.000Z).
* @type {number}
* @readonly
*/
static get EPOCH() {
return EPOCH;
}
} }