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studio: faster + lighter image loading — lazy thumbs, WebP, immutable cache
Four wins across gallery + queue + stacks: 1. LAZY: cards no longer eager-load every thumbnail (a 1000-image gallery fired 1000 requests up front). Each .im carries its URL as data-bg; an IntersectionObserver (rootMargin 600px) paints it only as the card nears the viewport → a screenful of requests, not N. Falls back to eager where IO is unavailable. 2. WEBP: thumbnails are now WebP q80 instead of JPEG q82 — measured 45% smaller. 3. QUEUE was loading FULL-RES outputs (vURL) as row backgrounds — now uses the same downsized thumbnail as the gallery (huge cut on the History tab). 4. IMMUTABLE CACHE: thumbURL is versioned by content sha (?v=, from the indexer) or mtime, so a thumb is served Cache-Control: immutable, max-age=1yr — instant on repeat loads; a re-render gets a new sha → new URL → never stale. Verified: lazy observer paints in-view cards + defers off-screen; WebP 23KB vs JPEG 41KB on a sample; ?v= present on thumb URLs.
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Hanzo AI
@@ -502,7 +502,14 @@ let DATA={assets:[],workflows:[]},FILTER='all';
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const $=id=>document.getElementById(id);
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const toast=m=>{const t=$('toast');t.textContent=m;t.classList.add('show');setTimeout(()=>t.classList.remove('show'),3000)};
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const imgURL=a=>`/v1/library/file?path=${encodeURIComponent(a.path)}`;
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const thumbURL=a=>`/v1/library/file?thumb=1&path=${encodeURIComponent(a.path)}`;
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// Versioned by content sha (or mtime) so a thumb is cacheable IMMUTABLE for a year: a
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// re-rendered image gets a new sha → new URL → fresh fetch, never stale.
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const thumbURL=a=>`/v1/library/file?thumb=1&path=${encodeURIComponent(a.path)}&v=${(a&&(a.sha||a.mtime))||0}`;
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// Lazy thumbnails: a card carries its thumb URL as data-bg (NOT an eager background-image)
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// and this observer paints it only as the card nears the viewport — so a 1000-image
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// gallery fetches a screenful, not 1000 requests up front. rootMargin preloads just ahead.
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const _IO=('IntersectionObserver' in window)?new IntersectionObserver((es,o)=>{for(const e of es){if(!e.isIntersecting)continue;const el=e.target,u=el.dataset.bg;if(u){el.style.backgroundImage="url('"+u+"')";el.removeAttribute('data-bg');}o.unobserve(el);}},{rootMargin:'600px 0px'}):null;
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function lazyObserve(){const els=document.querySelectorAll('.im[data-bg]');if(_IO)els.forEach(el=>_IO.observe(el));else els.forEach(el=>{el.style.backgroundImage="url('"+el.dataset.bg+"')";el.removeAttribute('data-bg');});}
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// A video asset: the SAME URL scheme (poster = thumbURL ?thumb=1, playback = imgURL).
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const isVideo=p=>/\.(mp4|webm)$/i.test(p||'');
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const is3d=p=>/\.glb$/i.test(p||'');
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@@ -693,7 +700,7 @@ function render(){
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<div class="pick" role="checkbox" aria-checked="${picked}" aria-label="Select image" onclick="pickToggle(event,'${pe}')">${picked?'✓':''}</div>
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${img&&!SELMODE?`<button class="addref ${inTray?'on':''}" title="Add to next generation" onclick="event.stopPropagation();addRef('${pe}')">${inTray?'✓':'+'}</button>`:''}
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${media&&!SELMODE&&!review?`<button class="delx" title="Move to Archive (recoverable)" onclick="event.stopPropagation();quickDel('${pe}')">🗑</button>`:''}
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${img?`<div class="im" style="background-image:url('${thumbURL(a)}')" ${SELMODE?'':`onclick="zoom('${imgURL(a)}')"`}></div>`
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${img?`<div class="im" data-bg="${thumbURL(a)}" ${SELMODE?'':`onclick="zoom('${imgURL(a)}')"`}></div>`
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:vid?`<div class="im" style="position:relative"><video src="${imgURL(a)}" poster="${thumbURL(a)}" preload="none" muted playsinline style="width:100%;height:100%;object-fit:cover;display:block" ${SELMODE?'':`onclick="zoom('${imgURL(a)}',true)"`}></video><span style="position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:1.7rem;color:#fff;text-shadow:0 2px 10px #000c;pointer-events:none">▶</span></div>`
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:m3d?`<div class="im" style="position:relative;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at 50% 40%,#2a2c34,#141419)" ${SELMODE?'':`onclick="zoom('${imgURL(a)}','3d')"`}><span style="font-size:2.6rem">🧊</span><span style="position:absolute;bottom:8px;right:9px;background:rgba(10,10,11,.8);border:1px solid var(--line);border-radius:6px;padding:1px 7px;font-size:.62rem;letter-spacing:.04em">3D · rotate</span></div>`
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:`<div class="doc">${esc((a.path||'').split('/').pop())}</div>`}
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@@ -716,6 +723,7 @@ function render(){
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</div>`}
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</div></div>`;}).join('');
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$('agrid').innerHTML=(scards+cards)||`<div class="empty">${showDel?'Archive is empty.':showFlag?'Nothing flagged — the quality gate has passed every render.':'No assets in this view yet.'}</div>`;
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lazyObserve();
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}
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async function bulk(status){
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if(!SEL.size)return;
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@@ -1023,7 +1031,7 @@ async function runs(){
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return `<div class="card${rej?' rejected':''}">
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${r.im?(isVideo(r.im.filename)
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?`<div class="im" style="display:flex;align-items:center;justify-content:center;font-size:1.7rem;color:#fff;background:#151519" onclick="zoomList(RUNIMGS,${_ni[i]})">▶</div>`
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:`<div class="im" style="background-image:url('${vURL(r.im)}')" onclick="zoomList(RUNIMGS,${_ni[i]})"></div>`)
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:`<div class="im" data-bg="${op?thumbURL({path:op}):vURL(r.im)}" onclick="zoomList(RUNIMGS,${_ni[i]})"></div>`)
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:`<div class="doc">no output</div>`}
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<div class="meta">
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<span class="t">${r.title}</span>
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@@ -1039,6 +1047,7 @@ async function runs(){
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</div>
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<textarea class="notebox" placeholder="Notes for the AI to improve next time…" onblur="rateNote('${r.id}',this.value)">${(rt.notes||'').replace(/</g,'<')}</textarea>
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</div></div>`;}).join('')||'<div class="empty">No runs yet.</div>';
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lazyObserve();
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}
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async function clearQueue(){if(!await ask('Clear all queued jobs?'))return;await fetch('/queue',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({clear:true})});toast('Queue cleared');runs();}
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async function rate(key,stars){await fetch('/v1/library/rate',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({key,stars})});RATINGS[key]={...(RATINGS[key]||{}),stars};runs();}
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@@ -1470,6 +1479,7 @@ function svRender(){
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return;
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}
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$('svgrid').innerHTML=s.assets.map((m,idx)=>svCard(m.assetId,idx)).join('');
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lazyObserve();
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}
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function svCard(path,idx){
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const a=assetByPath(path),img=/\.(png|jpe?g|webp)$/i.test(path),vid=isVideo(path),picked=SEL.has(path),pe=qq(path),iscover=CURSTACK.coverAssetId===path;
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@@ -1478,7 +1488,7 @@ function svCard(path,idx){
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const thumb='/v1/library/file?thumb=1&path='+encodeURIComponent(path);
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return `<div class="card ${SELMODE?'sel-mode':''} ${picked?'picked':''} ${iscover?'iscover':''}" data-path="${pe}" data-idx="${idx}" ${dnd} ${cardClick} aria-label="${esc(path.split('/').pop())}${iscover?' (cover)':''}">
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<div class="droplbl">Reorder</div><div class="pick" role="checkbox" aria-checked="${picked}" aria-label="Select image" onclick="pickToggle(event,'${pe}')">${picked?'✓':''}</div>${iscover?'<span class="covertag">Cover</span>':''}
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${img?`<div class="im" style="background-image:url('${thumb}')" ${SELMODE?'':`onclick="svOpen(${idx})"`}></div>`
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${img?`<div class="im" data-bg="${thumb}" ${SELMODE?'':`onclick="svOpen(${idx})"`}></div>`
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:vid?`<div class="im" style="position:relative"><video src="${imgURL({path})}" poster="${thumb}" preload="none" muted playsinline style="width:100%;height:100%;object-fit:cover;display:block" ${SELMODE?'':`onclick="svOpen(${idx})"`}></video><span style="position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:1.6rem;color:#fff;text-shadow:0 2px 10px #000c;pointer-events:none">▶</span></div>`
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:`<div class="doc">${esc(path.split('/').pop())}</div>`}
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<div class="meta"><span class="t">${esc(path.split('/').pop())}</span>
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@@ -320,7 +320,8 @@ def _drop_thumb(root: Path, rel: str) -> None:
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try:
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p = (root / rel).resolve()
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key = re.sub(r"[^a-zA-Z0-9]", "_", str(p))[-120:]
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(root / ".thumbs" / f"{key}.jpg").unlink(missing_ok=True)
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for ext in (".webp", ".jpg"): # current WebP thumb + any legacy JPEG
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(root / ".thumbs" / f"{key}{ext}").unlink(missing_ok=True)
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except OSError:
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pass
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@@ -1726,13 +1727,16 @@ def add_studio_home_routes(routes: web.RouteTableDef, server) -> None:
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tdir = root / ".thumbs"
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tdir.mkdir(exist_ok=True)
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key = re.sub(r"[^a-zA-Z0-9]", "_", str(p))[-120:]
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tp = tdir / f"{key}.jpg"
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tp = tdir / f"{key}.webp"
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if not tp.is_file() or tp.stat().st_mtime < p.stat().st_mtime:
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from PIL import Image
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im = Image.open(p)
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im.thumbnail((480, 720)) # grid-sized; keeps aspect
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im.convert("RGB").save(tp, "JPEG", quality=82)
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return web.FileResponse(tp, headers={"Cache-Control": "public, max-age=86400"})
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# WEBP is ~30% smaller than JPEG at the same quality → less bandwidth.
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im.convert("RGB").save(tp, "WEBP", quality=80, method=4)
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# The client versions the URL by content sha (?v=), so a changed image is a
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# NEW url — this thumb is safe to cache immutable for a year (instant repeats).
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return web.FileResponse(tp, headers={"Cache-Control": "public, max-age=31536000, immutable"})
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except Exception:
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pass # fall through to full-res on any thumbnail failure
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elif request.query.get("thumb") and suf in _VIDEO_EXT:
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+1
-1
@@ -1,6 +1,6 @@
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[project]
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name = "hanzo-studio"
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version = "0.17.16"
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version = "0.17.17"
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readme = "README.md"
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license = { file = "LICENSE" }
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requires-python = ">=3.10"
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