matt/flotilla
1
0
Fork 0
Code Issues Pull requests 1 Projects Releases Packages Wiki Activity Actions

Give each direction of a feed its own span width

Browse source
This commit is contained in:
Coracle-Bot 2026-09-17 20:17:11 +00:00
parent 95b92a07f1
commit 049ecc8151
1 changed files with 15 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
src/app/feeds.ts
View file

@ -386,6 +386,11 @@ const SPANS_PER_TRIGGER = 3
// which is what NIP-01 promises a filter carrying a limit.
const PAGE_SIZE = 100
// A span that turns up nothing widens the next one, so walking a sparse history doesn't take
// dozens of round trips
const nextInterval = (interval: number, found: number) =>
found > 0 ? int(MONTH) : Math.round(interval * 1.5)
// Whether a request is actually in flight, which is not the same as whether more might exist. A
// list that already has what it needs shouldn't sit under a spinner just because it hasn't
// walked to the end of the history.
@ -484,10 +489,13 @@ export const makeFeed = ({
// putting each of those on screen as it lands is what walks a room backwards under the reader.
const held = new Map<string, TrustedEvent>()
// The span the relays have been asked about, which grows outward from the anchor
// The span the relays have been asked about, which grows outward from the anchor. Each
// direction widens its own: what one of them is walking through says nothing about the other,
// and sharing a width lets a backward walk finding history reset the forward walk's growth.
let oldest = at
let newest = at
let interval = int(MONTH)
let olderInterval = int(MONTH)
let newerInterval = int(MONTH)
// How far back the feed has been answered for, which is what decides whether an event is ready
// to render or has to wait for the window to come and get it.
@ -591,12 +599,6 @@ export const makeFeed = ({
},
})
// A span that turns up nothing widens the next one, so walking a sparse history doesn't
// take dozens of round trips
if (complete) {
interval = found.length > 0 ? int(MONTH) : Math.round(interval * 1.5)
}
return {found, complete, pages}
}
@ -609,7 +611,7 @@ export const makeFeed = ({
if (oldest < now() - int(2, YEAR)) return {found: 0, complete: true, exhausted: true}
const until = oldest
const since = until - interval
const since = until - olderInterval
const {found, complete, pages} = await loadSpan({since, until, limit: PAGE_SIZE})
// A relay that answered with less than it was allowed has covered its whole span and holds
@ -623,6 +625,8 @@ export const makeFeed = ({
}
if (complete) {
olderInterval = nextInterval(olderInterval, found.length)
// The second the edge steps back is what stops a page that filled up inside one from being
// asked for over and over
oldest = edge === undefined ? since : Math.min(edge, until - 1)
@ -640,10 +644,11 @@ export const makeFeed = ({
if (newest >= now()) return {found: 0, complete: true, exhausted: true}
const since = newest
const until = Math.min(now(), since + interval)
const until = Math.min(now(), since + newerInterval)
const {found, complete} = await loadSpan({since, until})
if (complete) {
newerInterval = nextInterval(newerInterval, found.length)
newest = until
}