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libc/lzf: Update Kconfig comments

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This commit is contained in:
Gregory Nutt 2018-03-15 14:21:07 -06:00
parent 5fc6178201
commit eb4539c305
1 changed files with 11 additions and 0 deletions
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11
libc/lzf/Kconfig
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@ -40,6 +40,17 @@ config LIBC_LZF_HLOG
low-memory/faster configuration, use HLOG == 13; For best compression,
use 15 or 16 (or more, up to 22).
Memory usage for the hash table will be approximately:
4 * (1 << CONFIG_LIBC_LZF_HLOG)
For the default setting of 13, this is 32Kb. A setting of 12 would
be half that or about 16Kb.
The application calling lzf_compress() must provide the hash table to
the compresser and may allocate that memory in the most efficient way
for the application.
#ifndef HLOG
# define HLOG 13
#endif