Parse IP Bench

1import { bench, describe } from "vitest";
2import { parseIPv4, parseIPv6 } from "../src/writers/ip.js";
3
4/**
5 * Benchmark: the string -> raw-bytes IP parsers. `parseIPv6` is the heavier one
6 * (zero-run expansion, optional embedded IPv4) and was singled out in review, so
7 * it gets the spread of forms; `parseIPv4` is included as the cheap baseline.
8 *
9 * Bench-independent of the writers: each case parses a static string, so it
10 * measures only parsing cost. An equivalence guard runs first — a faster wrong
11 * answer is worthless.
12 */
13
14const V4 = "192.168.0.1";
15const V6_FULL = "2001:0db8:0000:0000:0000:ff00:0042:8329";
16const V6_COMPRESSED = "2001:db8::ff00:42:8329";
17const V6_MAPPED = "::ffff:1.2.3.4";
18
19// Equivalence guards: compressed and full forms must parse to the same bytes.
20if (parseIPv4(V4) !== 0xc0a80001) {
21  throw new Error("parseIPv4 sanity check failed");
22}
23if (!parseIPv6(V6_FULL).equals(parseIPv6(V6_COMPRESSED))) {
24  throw new Error("parseIPv6 full/compressed mismatch");
25}
26
27describe("parseIPv4", () => {
28  bench("dotted quad", () => {
29    parseIPv4(V4);
30  });
31});
32
33describe("parseIPv6", () => {
34  bench("fully expanded", () => {
35    parseIPv6(V6_FULL);
36  });
37  bench("zero-run compressed", () => {
38    parseIPv6(V6_COMPRESSED);
39  });
40  bench("IPv4-mapped", () => {
41    parseIPv6(V6_MAPPED);
42  });
43});