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| author | Nicholas Clark <nick@ccl4.org> | 2010-09-08 10:24:04 +0100 |
|---|---|---|
| committer | Nicholas Clark <nick@ccl4.org> | 2010-09-08 10:24:04 +0100 |
| commit | 9a87bd09eea1d037e82e99f6ece528e39e7fe0e6 (patch) | |
| tree | 687527f4f2be761e544a22f09e7bbd4ee0a51141 /perlapi.h | |
| parent | ea25a9b2cf73948b1e8c5675de027e0ad13277bd (diff) | |
| download | perl-9a87bd09eea1d037e82e99f6ece528e39e7fe0e6.tar.gz | |
Remove offer_nice_chunk(), PL_nice_chunk and PL_nice_chunk_size.
These provided a non-public API for the hash and array code to donate free
memory direct to the SV head allocation routines, instead of returning it
to the malloc system with free().
I assume that on some older mallocs this could offer significant benefits.
However, my benchmarking on a modern malloc couldn't detect any significant
effect (positive or negative) on removing the code. Its (continued) presence,
however, has downsides
a: slightly more code complexity
b: slightly larger interpreter structure
c: in the steady state, if net creation of SVs is zero, 1 chunk of allocated
but unused memory will exist (per thread)
So I think it best to remove it.
Diffstat (limited to 'perlapi.h')
| -rw-r--r-- | perlapi.h | 4 |
1 files changed, 0 insertions, 4 deletions
@@ -448,10 +448,6 @@ END_EXTERN_C #define PL_my_cxt_size (*Perl_Imy_cxt_size_ptr(aTHX)) #undef PL_na #define PL_na (*Perl_Ina_ptr(aTHX)) -#undef PL_nice_chunk -#define PL_nice_chunk (*Perl_Inice_chunk_ptr(aTHX)) -#undef PL_nice_chunk_size -#define PL_nice_chunk_size (*Perl_Inice_chunk_size_ptr(aTHX)) #undef PL_nomemok #define PL_nomemok (*Perl_Inomemok_ptr(aTHX)) #undef PL_numeric_local |