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Arena#309

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nostrademons wants to merge 14 commits intogoogle:v1.0.0from

nostrademons:arena

Commits on Feb 22, 2015

Change the initial vector sizes for attributes and stringbuffers.
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Commits on Feb 24, 2015

Bump version number to 0.9.4.
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Fix bug in StringBuffer tests that depends upon the default size of a stringbuffer (it fails if there are less than 7 characters available and doesn't explicitly reserve space).
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Reinitialize va_args with each call to vsnprintf in the error printing routines. vsnprintf may modify the va_args state, and in doing so it introduced potential memory corruption in the buffer it …
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Change repeated calls to string_buffer_destroy/string_buffer_init to a string_buffer_clear that just zeros out the vector instead of reallocating. Benchmarks:
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Bound string_buffer_clear to 8x initial size; any more than that and its reinitialized to a fresh buffer. This reduces the median high water mark from 195K to ~180K (still well above the 140K that…
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Move the buffer out of the temporary stringbuffer to final string nodes. The effect of this change is actually (and counterintuitively) starkly negative: CPU time increases by ~5%, total bytes all…
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Simple arena implementation.
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Tweak some magic numbers, setting minimum string_buffer size to 8 (no sense using less, as we always return word-aligned chunks) and arena size to 200K.
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Temporary change to expose chunk allocation stats to GumboStats.
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Handle out of memory errors for string buffers. This truncates the buffer at the maximum arena chunk size and continues parsing, setting the out_of_memory flag.
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Add out-of-memory handling to arenas, and a configurable chunk size. This adds an out_of_memory flag to GumboOutput, which is set if malloc fails or a vector is requested that exceeds the maximum …
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Commits on Feb 26, 2015

Fix arena allocation size. It wasn't taking into account the linked list fields on GumboArenaChunk when allocating memory, causing code to blow past the end of the allocation.
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Commits on Mar 3, 2015

Properly handle requests for allocations > chunk_size (it returns a fresh, dedicated block for them), and remove arena_chunk_size as a configurable parameter.
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