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== BCF Compression vs Compression Time ==

== BCF Compression vs Compression Time ==

The zlib deflation algorithm (a variant of LZ77) has 10 levels - 0 to 9.  0 has no compression but instead wraps up the file in zlib or bgzf blocks.

The zlib deflation algorithm (a variant of LZ77) has 10 levels - 0 to 9.  0 has no compression but instead wraps <br>

Levels 1-9 denote an increasing compression level in exchange for longer times for compression.

up the file in zlib or bgzf blocks. It may be useful to have 0 compression as it is indexable with the same mechanism <br>

used for compressed files.  Levels 1-9 denote an increasing compression level in exchange for longer times for <br>

compression.

In general, zlib compression does not have significant difference in compression between the 9 compression levels as shown in the following table:

In general, zlib compression does not have significant differences in compression between the 9 compression levels as <br>

shown in the following table:

{| class="wikitable"

{| class="wikitable"