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Pre-allocate buffers when adding string 

We do a conservative estimate of the number of characters, but still,
this limits the number of buffer reallocs to a small constant.
This commit is contained in:
Behdad Esfahbod 2011-08-15 16:21:22 +02:00
parent 553bc3de82
commit 4e9ff1dd6e
1 changed files with 1 additions and 0 deletions
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src/hb-buffer.cc
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@ -723,6 +723,7 @@ hb_buffer_guess_properties (hb_buffer_t *buffer)
} \ } \
if (item_length == -1) \ if (item_length == -1) \
item_length = text_length - item_offset; \ item_length = text_length - item_offset; \
buffer->ensure (buffer->len + item_length * sizeof (T) / 4); \
const T *next = (const T *) text + item_offset; \ const T *next = (const T *) text + item_offset; \
const T *end = next + item_length; \ const T *end = next + item_length; \
while (next < end) { \ while (next < end) { \