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listinvoice: speed up single-invoice case.

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satoshis.place was slowing to a crawl, c-lightning was unresponsive.
Logs revealed charged doing many, many listinvoice <label> RPCs.

We were iterating the entire db every time: stop that!

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2018-06-14 14:20:47 +09:30
committed by Christian Decker
parent 2848103841
commit d9a672ab02
1 changed files with 11 additions and 2 deletions
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13
lightningd/invoice.c
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@@ -384,11 +384,20 @@ static void json_add_invoices(struct json_result *response,
struct invoice_iterator it;
struct invoice_details details;
/* Don't iterate entire db if we're just after one. */
if (label) {
struct invoice invoice;
if (wallet_invoice_find_by_label(wallet, &invoice, label)) {
wallet_invoice_details(response, wallet, invoice,
&details);
json_add_invoice(response, &details, modern);
}
return;
}
memset(&it, 0, sizeof(it));
while (wallet_invoice_iterate(wallet, &it)) {
wallet_invoice_iterator_deref(response, wallet, &it, &details);
if (label && !json_escaped_eq(details.label, label))
continue;
json_add_invoice(response, &details, modern);
}
}