50 lines
1.5 KiB
Plaintext
50 lines
1.5 KiB
Plaintext
// infra_hash_bench.mbt —— 哈希方向基准：SHA-256 加密摘要 vs
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// xxHash64 / FNV-1a / CRC32 快速哈希在同一确定性负载上的吞吐对比，
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// 以及流式分块与一次性摘要的等价校验。
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///|
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fn hb_payload(n : Int, seed : Int) -> Array[Int] {
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let out : Array[Int] = []
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let mut s = seed
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for _ in 0..<n {
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s = (s * 1103515245 + 12345) & 0x7FFFFFFF
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out.push(s % 256)
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}
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out
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}
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///|
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test "smoke: digests agree between streaming and one-shot" {
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let data = hb_payload(4096, 20260712)
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let one = @hash.sha256(data)
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let head : Array[Int] = []
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let tail : Array[Int] = []
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for i in 0..<4096 {
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if i < 2048 {
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head.push(data[i])
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} else {
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tail.push(data[i])
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}
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}
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let h = @hash.Sha256Hasher::new()
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h.update(head)
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h.update(tail)
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assert_eq(@hash.digest_hex(h.finalize()), @hash.digest_hex(one))
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let c = @hash.Crc32Hasher::new()
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c.update(data)
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assert_eq(c.finalize(), @hash.crc32(data))
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}
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///|
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test "bench: crypto digest vs fast non-crypto hashes" (b : @bench.T) {
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for n in [1024, 16384] {
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let data = hb_payload(n, 20260712)
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b.bench(name="sha256_\{n}", fn() { b.keep(@hash.sha256(data)) })
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b.bench(name="sha3_256_\{n}", fn() { b.keep(@hash.sha3_256(data)) })
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b.bench(name="blake2b_\{n}", fn() { b.keep(@hash.blake2b(data)) })
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b.bench(name="xxhash64_\{n}", fn() { b.keep(@hash.xxhash64(data, 42)) })
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b.bench(name="fnv1a_64_\{n}", fn() { b.keep(@hash.fnv1a_64(data)) })
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b.bench(name="crc32_\{n}", fn() { b.keep(@hash.crc32(data)) })
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}
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}
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