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OPTIM: ebtree: make ebmb_insert_prefix() keep a copy the new node's key

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Similarly to the previous patch, it's better to keep a local copy of
the new node's key instead of accessing it every time. This slightly
reduces the code's size in the descent and further improves the load
time to 7.45s.
This commit is contained in:
Willy Tarreau 2022-11-15 08:08:31 +01:00
parent bf13e53964
commit 91d31c9e1c
1 changed files with 6 additions and 5 deletions
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11
include/import/ebmbtree.h
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@ -620,6 +620,7 @@ __ebmb_insert_prefix(struct eb_root *root, struct ebmb_node *new, unsigned int l
int old_node_bit; int old_node_bit;
unsigned int npfx = new->node.pfx; unsigned int npfx = new->node.pfx;
unsigned int npfx1 = npfx << 1; unsigned int npfx1 = npfx << 1;
const unsigned char *nkey = new->key;
side = EB_LEFT; side = EB_LEFT;
troot = root->b[EB_LEFT]; troot = root->b[EB_LEFT];
@ -679,13 +680,13 @@ __ebmb_insert_prefix(struct eb_root *root, struct ebmb_node *new, unsigned int l
/* No need to compare everything if the leaves are shorter than the new one. */ /* No need to compare everything if the leaves are shorter than the new one. */
if (len > old->node.pfx) if (len > old->node.pfx)
len = old->node.pfx; len = old->node.pfx;
bit = equal_bits(new->key, old->key, bit, len); bit = equal_bits(nkey, old->key, bit, len);
break; break;
} }
/* WARNING: for the two blocks below, <bit> is counted in half-bits */ /* WARNING: for the two blocks below, <bit> is counted in half-bits */
bit = equal_bits(new->key, old->key, bit, old_node_bit >> 1); bit = equal_bits(nkey, old->key, bit, old_node_bit >> 1);
bit = (bit << 1) + 1; // assume comparisons with normal nodes bit = (bit << 1) + 1; // assume comparisons with normal nodes
/* we must always check that our prefix is larger than the nodes /* we must always check that our prefix is larger than the nodes
@ -710,7 +711,7 @@ __ebmb_insert_prefix(struct eb_root *root, struct ebmb_node *new, unsigned int l
new->node.node_p = old->node.node_p; new->node.node_p = old->node.node_p;
up_ptr = &old->node.node_p; up_ptr = &old->node.node_p;
new->node.bit = bit; new->node.bit = bit;
diff = cmp_bits(new->key, old->key, bit >> 1); diff = cmp_bits(nkey, old->key, bit >> 1);
goto insert_above; goto insert_above;
} }
@ -746,7 +747,7 @@ __ebmb_insert_prefix(struct eb_root *root, struct ebmb_node *new, unsigned int l
root = &old->node.branches; root = &old->node.branches;
side = old_node_bit & 7; side = old_node_bit & 7;
side ^= 7; side ^= 7;
side = (new->key[old_node_bit >> 3] >> side) & 1; side = (nkey[old_node_bit >> 3] >> side) & 1;
troot = root->b[side]; troot = root->b[side];
} }
@ -789,7 +790,7 @@ __ebmb_insert_prefix(struct eb_root *root, struct ebmb_node *new, unsigned int l
*/ */
diff = 0; diff = 0;
if (bit < old->node.pfx && bit < npfx) if (bit < old->node.pfx && bit < npfx)
diff = cmp_bits(new->key, old->key, bit); diff = cmp_bits(nkey, old->key, bit);
if (diff == 0) { if (diff == 0) {
/* Both keys match. Either it's a duplicate entry or we have to /* Both keys match. Either it's a duplicate entry or we have to