pax/booru-viewer
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Prefetch in all 4 directions (left, right, up, down)

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CDN downloads don't count against API rate limits so we can
safely prefetch all adjacent posts for instant navigation.
This commit is contained in:
pax 2026-04-05 00:32:04 -05:00
parent a9d177ee91
commit 5d48581f52
1 changed files with 4 additions and 4 deletions
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8
booru_viewer/gui/app.py
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@ -765,13 +765,13 @@ class BooruApp(QMainWindow):
self._prefetch_adjacent(index) self._prefetch_adjacent(index)
def _prefetch_adjacent(self, index: int) -> None: def _prefetch_adjacent(self, index: int) -> None:
"""Silently download adjacent posts with staggered delays.""" """Prefetch posts in all 4 directions (left, right, up, down)."""
cols = self._grid._flow.columns
offsets = [1, -1, cols, -cols]
async def _prefetch_batch(): async def _prefetch_batch():
for i, offset in enumerate((1, -1)): for offset in offsets:
adj = index + offset adj = index + offset
if 0 <= adj < len(self._posts) and self._posts[adj].file_url: if 0 <= adj < len(self._posts) and self._posts[adj].file_url:
if i > 0:
await asyncio.sleep(1)
try: try:
await download_image(self._posts[adj].file_url) await download_image(self._posts[adj].file_url)
except Exception: except Exception: