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Merge branch 'ps/reftable-iteration-perf'

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The code to iterate over refs with the reftable backend has seen
some optimization.

* ps/reftable-iteration-perf:
  reftable/reader: add comments to `table_iter_next()`
  reftable/record: don't try to reallocate ref record name
  reftable/block: swap buffers instead of copying
  reftable/pq: allocation-less comparison of entry keys
  reftable/merged: skip comparison for records of the same subiter
  reftable/merged: allocation-less dropping of shadowed records
  reftable/record: introduce function to compare records by key
This commit is contained in:
Junio C Hamano
2024-02-26 18:10:24 -08:00
parent 274400998b c68ca7abd3
commit 9f67cbd0a7
7 changed files with 102 additions and 39 deletions
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13
reftable/pq.c
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@ -14,20 +14,9 @@ https://developers.google.com/open-source/licenses/bsd
int pq_less(struct pq_entry *a, struct pq_entry *b)
{
struct strbuf ak = STRBUF_INIT;
struct strbuf bk = STRBUF_INIT;
int cmp = 0;
reftable_record_key(&a->rec, &ak);
reftable_record_key(&b->rec, &bk);
cmp = strbuf_cmp(&ak, &bk);
strbuf_release(&ak);
strbuf_release(&bk);
int cmp = reftable_record_cmp(&a->rec, &b->rec);
if (cmp == 0)
return a->index > b->index;
return cmp < 0;
}