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storage_service: reserve space in get_range_to_address_map and friends

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To reduce the chance of reallocation.

Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
This commit is contained in:
Benny Halevy
2022-07-24 15:02:24 +03:00
committed by Avi Kivity
parent 5eb31eff64
commit bc5f6cf45d
1 changed files with 3 additions and 0 deletions
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3
service/storage_service.cc
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@@ -760,6 +760,7 @@ storage_service::get_range_to_address_map_in_local_dc(
locator::effective_replication_map_ptr erm) const {
auto orig_map = co_await get_range_to_address_map(erm, co_await get_tokens_in_local_dc(*erm->get_token_metadata_ptr()));
std::unordered_map<dht::token_range, inet_address_vector_replica_set> filtered_map;
filtered_map.reserve(orig_map.size());
for (auto entry : orig_map) {
auto& addresses = filtered_map[entry.first];
addresses.reserve(entry.second.size());
@@ -3110,6 +3111,7 @@ storage_service::construct_range_to_endpoint_map(
locator::effective_replication_map_ptr erm,
const dht::token_range_vector& ranges) const {
std::unordered_map<dht::token_range, inet_address_vector_replica_set> res;
res.reserve(ranges.size());
for (auto r : ranges) {
res[r] = erm->get_natural_endpoints(
r.end() ? r.end()->value() : dht::maximum_token());
@@ -3374,6 +3376,7 @@ storage_service::get_all_ranges(const std::vector<token>& sorted_tokens) const {
co_return dht::token_range_vector();
int size = sorted_tokens.size();
dht::token_range_vector ranges;
ranges.reserve(size);
ranges.push_back(dht::token_range::make_ending_with(range_bound<token>(sorted_tokens[0], true)));
co_await coroutine::maybe_yield();
for (int i = 1; i < size; ++i) {