lobo/isync
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knock out ReNew if there are no dummies

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the operation requires loading the target side, which makes it somewhat
expensive in otherwise unidirectional syncs.

one could also knock out Flags and Delete if there are no living pairs,
but that wouldn't actually save much.
This commit is contained in:
Oswald Buddenhagen 2022-02-18 17:45:01 +01:00
parent 1d433b4773
commit 2f4b71c56e
1 changed files with 14 additions and 1 deletions
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15
src/sync.c
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@ -680,14 +680,23 @@ box_opened2( sync_vars_t *svars, int t )
if (!lock_state( svars ))
goto bail;
int any_dummies[2] = { 0, 0 };
int any_purges[2] = { 0, 0 };
int any_upgrades[2] = { 0, 0 };
int any_new[2] = { 0, 0 };
int any_tuids[2] = { 0, 0 };
if (svars->replayed) {
if (svars->replayed || ((chan->ops[F] | chan->ops[N]) & OP_RENEW)) {
for (srec = svars->srecs; srec; srec = srec->next) {
if (srec->status & S_DEAD)
continue;
if (srec->status & S_DUMMY(F))
any_dummies[F]++;
else if (srec->status & S_DUMMY(N))
any_dummies[N]++;
else if (srec->status & S_SKIPPED)
any_dummies[!srec->uid[F] ? F : N]++;
if (!svars->replayed)
continue;
if (srec->status & S_PURGE) {
any_purges[srec->uid[F] ? F : N]++;
} else if (srec->status & S_PENDING) {
@ -721,6 +730,10 @@ box_opened2( sync_vars_t *svars, int t )
if (chan->ops[t] & OP_FLAGS)
opts[t^1] |= OPEN_FLAGS;
}
if (!any_dummies[t] && (chan->ops[t] & OP_RENEW)) {
chan->ops[t] &= ~OP_RENEW;
debug( "no %s dummies; masking ReNew\n", str_fn[t] );
}
if ((chan->ops[t] & (OP_NEW | OP_RENEW)) || any_new[t] || any_upgrades[t]) {
opts[t] |= OPEN_APPEND;
if ((chan->ops[t] & OP_NEW) || any_new[t]) {