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fixed size arrays in NostrIndex, where possible

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- shrinks records by 16 bytes, and 16 bytes for every e or p tag
This commit is contained in:
Doug Hoyte
2023-01-11 16:23:18 -05:00
parent 6bd53937c6
commit c31a213704
5 changed files with 86 additions and 28 deletions
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23
src/ActiveMonitors.h
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@ -30,6 +30,14 @@ struct ActiveMonitors : NonCopyable {
std::map<uint64_t, MonitorSet> allKinds;
MonitorSet allOthers;
std::string tagSpecBuf = std::string(256, '\0');
const std::string &getTagSpec(uint8_t k, std::string_view val) {
tagSpecBuf.clear();
tagSpecBuf += (char)k;
tagSpecBuf += val;
return tagSpecBuf;
}
public:
void addSub(lmdb::txn &txn, Subscription &&sub, uint64_t currEventId) {
@ -124,10 +132,15 @@ struct ActiveMonitors : NonCopyable {
}));
}
for (const auto &tag : *flat->tags()) {
// FIXME: can avoid this allocation:
auto tagSpec = std::string(1, (char)tag->key()) + std::string(sv(tag->val()));
for (const auto &tag : *flat->tagsFixed32()) {
auto &tagSpec = getTagSpec(tag->key(), sv(tag->val()));
processMonitorsExact(allTags, tagSpec, static_cast<std::function<bool(const std::string&)>>([&](const std::string &val){
return tagSpec == val;
}));
}
for (const auto &tag : *flat->tagsGeneral()) {
auto &tagSpec = getTagSpec(tag->key(), sv(tag->val()));
processMonitorsExact(allTags, tagSpec, static_cast<std::function<bool(const std::string&)>>([&](const std::string &val){
return tagSpec == val;
}));
@ -174,7 +187,7 @@ struct ActiveMonitors : NonCopyable {
} else if (f.tags.size()) {
for (const auto &[tagName, filterSet] : f.tags) {
for (size_t i = 0; i < filterSet.size(); i++) {
std::string tagSpec = std::string(1, tagName) + filterSet.at(i);
auto &tagSpec = getTagSpec(tagName, filterSet.at(i));
auto res = allTags.try_emplace(tagSpec);
res.first->second.try_emplace(&f, MonitorItem{m, currEventId});
}
@ -207,7 +220,7 @@ struct ActiveMonitors : NonCopyable {
} else if (f.tags.size()) {
for (const auto &[tagName, filterSet] : f.tags) {
for (size_t i = 0; i < filterSet.size(); i++) {
std::string tagSpec = std::string(1, tagName) + filterSet.at(i);
auto &tagSpec = getTagSpec(tagName, filterSet.at(i));
auto &monSet = allTags.at(tagSpec);
monSet.erase(&f);
if (monSet.empty()) allTags.erase(tagSpec);