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Code Issues Releases Wiki Activity

modules/client/rooms/messages: Cleanup loop; improve prefetch; reduce density of branches.

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This commit is contained in:
Jason Volk 2019-09-17 19:17:33 -07:00
parent be2ae27af6
commit 404da37cc4
1 changed files with 14 additions and 19 deletions
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33
modules/client/rooms/messages.cc
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@ -40,7 +40,7 @@ conf::item<size_t>
prefetch_max
{
{ "name", "ircd.client.rooms.messages.prefetch.max" },
{ "default", 32L },
{ "default", 24L },
};
log::log
@ -132,12 +132,12 @@ get__messages(client &client,
top, "chunk"
};
const auto &pfetch_max
const auto &max_prefetch
{
std::min(size_t(page.limit), size_t(prefetch_max))
};
size_t pfetch{0}, pfetched{0};
size_t prefetch{0};
m::room::events pf
{
room
@ -151,10 +151,10 @@ get__messages(client &client,
for(; it; page.dir == 'b'? --it : ++it)
{
for(; pf && pfetch < pfetched + prefetch_max; page.dir == 'b'? --pf : ++pf)
pfetch += pf.prefetch();
for(; pf && prefetch < hit + miss + max_prefetch; page.dir == 'b'? --pf : ++pf)
prefetch += pf.prefetch();
if(hit + miss == 0 && pfetch > 0)
if(hit + miss == 0 && prefetch > 0)
ctx::yield();
const m::event &event
@ -166,22 +166,17 @@ get__messages(client &client,
if(hit > page.limit || miss >= size_t(max_filter_miss))
break;
if(!visible(event, request.user_id))
const bool ok
{
++miss;
continue;
}
(empty(filter_json) || match(filter, event))
if(!empty(filter_json) && !match(filter, event))
{
++miss;
continue;
}
&& visible(event, request.user_id)
if(_append(chunk, event, it.event_idx(), user_room, room_depth))
++hit;
else
++miss;
&& _append(chunk, event, it.event_idx(), user_room, room_depth)
};
hit += ok;
miss += !ok;
}
chunk.~array();