Hawkynt

LZTURBO

Fast hash-matched LZ77 front end wrapped in a magic/method/length block, modelling LZTURBO’s documented outer shape. LZTURBO’s real bitstream is closed-source and undocumented, so only the documented block layout is reproduced; the proprietary entropy back end is not (payload is left entropy-uncoded).

Properties

Property	Value
Category	Compression Algorithms
Sub-category	Dictionary
Security status	🎓 Educational Only
Complexity	Advanced
Inventor	powturbo
Year	2013
Origin	Not specified
Source	algorithms/compression/lzturbo.js

Security

Status: 🎓 Educational Only

No vulnerabilities are recorded for this implementation.

Documentation

• powturbo Website
• TurboBench Repository
• Fast Compression Overview

References

• LZ77 Foundation
• Fast Compression Techniques
• Compression Benchmarks

Test vectors

9 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.

Vector 1 — Empty input

Field	Value
input	(empty)
expected	4c5a5431000000000000000000

Vector 2 — Single byte literal

Field	Value
input	41
expected	4c5a54310001000000020000001f41

Vector 3 — Two character literals

Field	Value
input	4142
expected	4c5a54310002000000030000002f4142

Vector 4 — Repeating pattern shorter than the minimum match length

Field	Value
input	414243414243
expected	4c5a54310006000000070000006f414243414243

Vector 5 — Structured pattern with clear repetition

Field	Value
input	616263646566616263646566
expected	4c5a5431000c0000000a00000062616263646566060000

Vector 6 — Text with no repetition - all literals

Field	Value
input	48656c6c6f20576f726c64
expected	4c5a5431000b0000000c000000bf48656c6c6f20576f726c64

Vector 7 — Repeated text sample (4x)

Field	Value
input	74686520717569636b2062726f776e20 666f78206a756d7073206f7665722074 6865206c617a7920646f672e20746865 20717569636b2062726f776e20666f78 206a756d7073206f7665722074686520 6c617a7920646f672e20746865207175 69636b2062726f776e20666f78206a75 6d7073206f76657220746865206c617a 7920646f672e2074686520717569636b 2062726f776e20666f78206a756d7073 206f76657220746865206c617a792064 6f672e20
expected	4c5a543100b400000036000000f01074 686520717569636b2062726f776e2066 6f78206a756d7073206f766572201f00 00916c617a7920646f672e0e00000e71 2d0000

Vector 8 — 256 repeated bytes

Field	Value
input	61616161616161616161616161616161 61616161616161616161616161616161 61616161616161616161616161616161 61616161616161616161616161616161 61616161616161616161616161616161 61616161616161616161616161616161 61616161616161616161616161616161 61616161616161616161616161616161 61616161616161616161616161616161 61616161616161616161616161616161 61616161616161616161616161616161 61616161616161616161616161616161 61616161616161616161616161616161 61616161616161616161616161616161 61616161616161616161616161616161 61616161616161616161616161616161
expected	4c5a54310000010000060000001e61ed010000

Vector 9 — All 256 byte values

Field	Value
input	000102030405060708090a0b0c0d0e0f 101112131415161718191a1b1c1d1e1f 202122232425262728292a2b2c2d2e2f 303132333435363738393a3b3c3d3e3f 404142434445464748494a4b4c4d4e4f 505152535455565758595a5b5c5d5e5f 606162636465666768696a6b6c6d6e6f 707172737475767778797a7b7c7d7e7f 808182838485868788898a8b8c8d8e8f 909192939495969798999a9b9c9d9e9f a0a1a2a3a4a5a6a7a8a9aaabacadaeaf b0b1b2b3b4b5b6b7b8b9babbbcbdbebf c0c1c2c3c4c5c6c7c8c9cacbcccdcecf d0d1d2d3d4d5d6d7d8d9dadbdcdddedf e0e1e2e3e4e5e6e7e8e9eaebecedeeef f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff
expected	4c5a5431000001000002010000fff100 0102030405060708090a0b0c0d0e0f10 1112131415161718191a1b1c1d1e1f20 2122232425262728292a2b2c2d2e2f30 … (271 bytes; the full value is in the source)

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