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More ratelimit optimizations

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This commit is contained in:
Nils O. Selåsdal
2013-10-15 21:35:10 +02:00
parent c1ef4af4ad
commit 0a36c669c6
2 changed files with 10 additions and 9 deletions
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src/rate_limit.c
+8 -7
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@@ -5,11 +5,7 @@ void uc_ratelimit_init(struct RateLimit *r, long tickets, long period, long curr
{
r->tickets = tickets;
if (tickets > period) {
r->ticket_cost = tickets * period;
} else {
r->ticket_cost = period;
}
r->ticket_cost = period;
r->period = period;
r->funds = r->ticket_cost * tickets;
@@ -48,8 +44,13 @@ int uc_ratelimit_allow(struct RateLimit *r, long current_ts)
//Calculate the cost of tickets that became available since
//the last time.
r->funds += diff_period *
((r->tickets * r->ticket_cost) / r->period);
r->funds += diff_period * r->tickets;
//the below is the real algorithm, with ticket_cost =
//tickets * period.
//we have optimized this to the expression used above
//r->funds += diff_period *
// ((r->tickets * r->ticket_cost) / r->period);
//throttle handing out tickets
if (r->funds > r->ticket_cost * r->tickets) {