Actually these are not strings, but byte arrays. Factor strings are
stored as UCS2 and 'strings' would not find them.
These byte arrays contain C library symbol names for relocation
information. Indeed they could be interned, but it would save some Kb
at most. I'm not sure if it is worth the extra complexity.
Slava
On 2-Oct-07, at 6:17 PM, Samuel Tardieu wrote:
> When looking at the output of "strings factor.image", I noticed that
> a few strings seem to be repeated a lot of time. I saved the result
> into "factor.strings" and ran:
>
> : count-into ( seq hash -- )
> [ [ [ drop 0 ] cache 1+ ] 2keep set-at ] curry each ;
>
> : count ( seq -- hash ) H{ } clone tuck count-into ;
>
> : items ( hash -- seq ) [ { } 2sequence ] { } assoc>map ;
>
> : sorted ( seq -- sortedseq ) [ second swap second <=> ] sort ;
>
> : analyze ( seq n -- seq ) >r count items sorted r> head ;
>
> "factor.strings" <file-reader> lines 10 analyze .
>
> It looks like those strings are present *a lot* of times in the image:
>
> {
> { "stack_chain" 1137 }
> { "cards_offset" 855 }
> { "alien_offset" 564 }
> { "nursery" 509 }
> { "simple_gc" 508 }
> { "to_cell" 416 }
> { "to_fixnum" 390 }
> { "PGe G" 150 }
> { "box_signed_4" 140 }
> { "to_double" 139 }
> }
>
> Wouldn't it be better to intern strings as is done in Java class
> files? Strings are immutable (as long as they are not passed to a
> foreign function).
>
> Sam
> --
> Samuel Tardieu -- [EMAIL PROTECTED] -- http://www.rfc1149.net/
>
>
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