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Merge pull request #6 from jimmytaker/omaster

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Use bigger buffer when reading big blobs to increase performance
This commit is contained in:
Cyber Emissary
2018-02-12 15:48:30 -05:00
committed by GitHub
parent 6d9fc7d397 55d57c65cf
commit 104d952cda
1 changed files with 4 additions and 4 deletions
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8
src/libmdb/data.c
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@@ -604,18 +604,18 @@ void*
mdb_ole_read_full(MdbHandle *mdb, MdbColumn *col, size_t *size) mdb_ole_read_full(MdbHandle *mdb, MdbColumn *col, size_t *size)
{ {
char ole_ptr[MDB_MEMO_OVERHEAD]; char ole_ptr[MDB_MEMO_OVERHEAD];
char *result = malloc(MDB_BIND_SIZE); char *result = malloc(MDB_BIND_SIZE * 64);
size_t result_buffer_size = MDB_BIND_SIZE; size_t result_buffer_size = MDB_BIND_SIZE * 64;
size_t len, pos; size_t len, pos;
memcpy(ole_ptr, col->bind_ptr, MDB_MEMO_OVERHEAD); memcpy(ole_ptr, col->bind_ptr, MDB_MEMO_OVERHEAD);
len = mdb_ole_read(mdb, col, ole_ptr, MDB_BIND_SIZE); len = mdb_ole_read(mdb, col, ole_ptr, MDB_BIND_SIZE * 64);
memcpy(result, col->bind_ptr, len); memcpy(result, col->bind_ptr, len);
pos = len; pos = len;
while ((len = mdb_ole_read_next(mdb, col, ole_ptr))) { while ((len = mdb_ole_read_next(mdb, col, ole_ptr))) {
if (pos+len >= result_buffer_size) { if (pos+len >= result_buffer_size) {
result_buffer_size += MDB_BIND_SIZE; result_buffer_size += MDB_BIND_SIZE * 64;
result = realloc(result, result_buffer_size); result = realloc(result, result_buffer_size);
} }
memcpy(result + pos, col->bind_ptr, len); memcpy(result + pos, col->bind_ptr, len);