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mdbx: more likely/unlikely for mdb_node_add.

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Change-Id: I1f241c6cea55db6fed744ba9f6f5733f6622015f
This commit is contained in:
Leo Yuriev 2016-05-08 02:29:59 +03:00
parent 4d3e349c16
commit 7c3c28239c
1 changed files with 6 additions and 6 deletions
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12
mdb.c
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@ -7327,10 +7327,10 @@ mdb_node_add(MDB_cursor *mc, indx_t indx,
node_size += key->mv_size; node_size += key->mv_size;
if (IS_LEAF(mp)) { if (IS_LEAF(mp)) {
mdb_cassert(mc, key && data); mdb_cassert(mc, key && data);
if (F_ISSET(flags, F_BIGDATA)) { if (unlikely(F_ISSET(flags, F_BIGDATA))) {
/* Data already on overflow page. */ /* Data already on overflow page. */
node_size += sizeof(pgno_t); node_size += sizeof(pgno_t);
} else if (node_size + data->mv_size > mc->mc_txn->mt_env->me_nodemax) { } else if (unlikely(node_size + data->mv_size > mc->mc_txn->mt_env->me_nodemax)) {
int ovpages = OVPAGES(data->mv_size, mc->mc_txn->mt_env->me_psize); int ovpages = OVPAGES(data->mv_size, mc->mc_txn->mt_env->me_psize);
int rc; int rc;
/* Put data on overflow page. */ /* Put data on overflow page. */
@ -7378,19 +7378,19 @@ update:
if (IS_LEAF(mp)) { if (IS_LEAF(mp)) {
ndata = NODEDATA(node); ndata = NODEDATA(node);
if (ofp == NULL) { if (unlikely(ofp == NULL)) {
if (F_ISSET(flags, F_BIGDATA)) if (unlikely(F_ISSET(flags, F_BIGDATA)))
memcpy(ndata, data->mv_data, sizeof(pgno_t)); memcpy(ndata, data->mv_data, sizeof(pgno_t));
else if (F_ISSET(flags, MDB_RESERVE)) else if (F_ISSET(flags, MDB_RESERVE))
data->mv_data = ndata; data->mv_data = ndata;
else if (ndata != data->mv_data) else if (likely(ndata != data->mv_data))
memcpy(ndata, data->mv_data, data->mv_size); memcpy(ndata, data->mv_data, data->mv_size);
} else { } else {
memcpy(ndata, &ofp->mp_pgno, sizeof(pgno_t)); memcpy(ndata, &ofp->mp_pgno, sizeof(pgno_t));
ndata = PAGEDATA(ofp); ndata = PAGEDATA(ofp);
if (F_ISSET(flags, MDB_RESERVE)) if (F_ISSET(flags, MDB_RESERVE))
data->mv_data = ndata; data->mv_data = ndata;
else if (ndata != data->mv_data) else if (likely(ndata != data->mv_data))
memcpy(ndata, data->mv_data, data->mv_size); memcpy(ndata, data->mv_data, data->mv_size);
} }
} }