Database connections kept open; a click's wait is measured (#241, #245, #246)

#241: on production, All Subscriptions' query runs in 31 ms, unread oldest-first in 30, the
feed list's count in 5, generic plans included (EXPLAIN ANALYZE, BUFFERS, read only), against
0.3-1.6 s in ipx. A new Postgres connection takes 80-330 ms to open, and a page load asks for
more than are idle: four of six slow loads came as the pool grew (3 to 6, 2 to 6, 3 to 5, 6 to
8), and 20 requests at once took a median 414 ms while the pool grew from 8 to 20. The daemon
and the directory's server now keep their whole pool open (min = max); a command such as `ipx
status`, and the tests, which share the server's 100 connections, open as they need.

#246: the page reports list_shown, the ms from asking for a list to drawing it, with the view
and filter, under the click's trace; background refreshes are not timed. Timings skip report()'s
once-a-minute limit, which is for errors in a loop. A dashboard panel and table, and the prod
check, read it.

#245: the load test's browse scenario subscribes by OPML and leaves the Directory, which is
ipx-directory's since #204, to it.

CLAUDE.md records the owner's leave to EXPLAIN (ANALYZE, BUFFERS) any query on production,
read only.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/events.ts

@@ -6,7 +6,7 @@ let sse: EventSource;
 /// the app is in the background, when everything is missed (#168).
 const catchUp=(()=>{ let t: number; return ()=>{ clearTimeout(t); t=setTimeout(()=>{
   loadFeeds(true).catch(()=>{});
-  if(S.feed) loadEntries().catch(()=>{});
+  if(S.feed) loadEntries(false,true).catch(()=>{});
 },300); }; })();
 document.addEventListener('visibilitychange',()=>{ if(!document.hidden) catchUp(); });
 let dropped=false;
@@ -16,7 +16,7 @@ function connect(){
   sse.onopen=()=>{ if(dropped){ dropped=false; catchUp(); } };
   const soon=(fn: ()=>void,ms=500)=>{ let t: number; return ()=>{ clearTimeout(t); t=setTimeout(fn,ms); }; };
   // Caught: a network gone when one fires (a laptop asleep) was an unhandled rejection (#219).
-  const refreshEntries=soon(()=>{ if(S.feed) loadEntries().catch(()=>{}); });
+  const refreshEntries=soon(()=>{ if(S.feed) loadEntries(false,true).catch(()=>{}); });
   // Every scan's events reach everyone; only this person's feeds are theirs to show or refresh.
   const mine=(id: string)=>S.feeds.some(f=>f.id===id);
   sse.onmessage=m=>{
@@ -41,7 +41,7 @@ function connect(){
       if(!mine(ev.feed)) return;
       if(ev.saved_s>0&&document.querySelector('.dapend')) toast(`DeadAir is done: ${shorter(ev.saved_s)}`);
       refreshEntries();
-      if(S.sel) loadEntries().then(()=>{ const e=cur(); if(e) showDetail(e); }).catch(()=>{});
+      if(S.sel) loadEntries(false,true).then(()=>{ const e=cur(); if(e) showDetail(e); }).catch(()=>{});
     }
     else if(ev.ev==='download_error'){
       const bar=document.querySelector(`.dlbar[data-bar="${ev.enclosure}"]`);

web/src/items.ts

@@ -1,6 +1,7 @@
 /* ---------------- items ---------------- */
 let loadSeq=0;
-async function loadEntries(append?: boolean){
+/// `quiet` for a refresh nobody asked for (a live update): not a wait anyone sees, so not timed.
+async function loadEntries(append?: boolean, quiet?: boolean){
   // The Directory lists feeds, and Currently Listening draws its own episodes.
   if(!S.feed || VIEWS[S.feed]?.url) return;
   const p=new URLSearchParams({offset:String(S.offset),limit:String(LIMIT),filter:S.filter,sort:S.sort.col,dir:S.sort.dir});
@@ -29,6 +30,9 @@ async function loadEntries(append?: boolean){
   }
   S.entries = entries;
   renderEntries();
+  // From asking to the list drawn: what someone waits for after a click, under that click's trace
+  // (#246). The API's own time is in the trace; this is the whole wait, the network included.
+  if(!quiet) report('list_shown',{ms:Math.round(performance.now()-asked),feed:S.feed,filter:S.filter});
 }
 function renderEntries(){
   const box=$('#eps'); if(!box) return;

web/src/util.ts

@@ -93,8 +93,9 @@ function traceparent(){
 /// a frame.
 const reported=new Map<string,number>();
 function report(ev: string, o: Record<string,any>={}){
+  // A timing comes of something someone did, not a loop, so every one is sent.
   const key=ev+(o.msg||''), now=Date.now();
-  if(o.msg==='signed out' || now-(reported.get(key)||0)<60_000) return;
+  if(o.msg==='signed out' || (o.ms==null && now-(reported.get(key)||0)<60_000)) return;
   reported.set(key,now);
   fetch('/api/client',{method:'POST',keepalive:true,headers:{'Content-Type':'application/json',traceparent:traceparent()},
     body:JSON.stringify({ev,...o})}).catch(()=>{});