[Zlib-devel] DEF_MEM_LEVEL vs. MAX_MEM_LEVEL

[Jan Ringoš]

Why DEF_MEM_LEVEL (along with Z_DEFAULT_COMPRESSION, -MAX_WBITS and Z_DEFAULT_STRATEGY) gives better compression than MAX_MEM_LEVEL ?

I compress 65471 bytes long buffers of general data and the output buffer is always few bytes longer with MAX_MEM_LEVEL than with DEF_MEM_LEVEL.

How significant is performance gain when MAX_MEM_LEVEL is used?

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Jan Ringoš, Tringi at Mx-3.cz
http://Tringi.Mx-3.cz

n.v.t. MX-3, www.mx-3.cz
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