Thanks Niphlod for your help, Seems a connection to a legacy database was a culprit for a real slow down...
On Thursday, August 22, 2013 4:31:22 PM UTC-4, Niphlod wrote: > > uhm. download() lets web2py stream the file instead of nginx. > fast_download() too, it just skips the part that handles the authorization > logic and adds correct cache headers, but this will lead to faster loading > of pages from the 2nd time the user accesses the page: it won't change a > thing in the 1st request. > > Why don't you just put those images in "static/something" ? > > The other very smart thing to do is using http://wiki.nginx.org/X-accel . > This basically enables nginx to "intercept" an empty page with some special > headers (so web2py does it without even accessing the file) and take care > of serving the file instead of your application. This will probably speed > up your 1st request (and releaves some pressure from the web2py process), > but the hard-limit of bandwith will of course remain there, no matter what. > > Your fast download will then kinda look like > def fast_download(): > .... > filename = os.path.join(request.folder,'uploads',request.args(0)) > response.headers['X-Accel-Redirect'] = os.path.join(request.folder, > 'uploads', document.file) > return '' > > > > On Thursday, August 22, 2013 10:06:34 PM UTC+2, Adi wrote: >> >> >> >> Hello everyone. >> >> Am trying to populate a page with around 20 dynamic images from the >> upload folder, but they get rendered extremely slow, even as thumbnails. >> Tried using a suggest approach from the forum "fast_download()", but >> without luck in my case. >> >> Anyone has a suggestion, what should I be looking at, and how to improve >> the speed of loading dynamic images? >> >> Platform: clean ubuntu node with web2py and nginx (no caching setup, 1Gb >> of ram). Nothing else is running on it. >> >> Performed following three tests: >> >> Regular download(): >> Compressed images (through PIL, with extension .thumbnail): >> http://www.webpagetest.org/result/130822_1F_WAD/ (500Kb in 25 sec) >> Regular size images: http://www.webpagetest.org/result/130822_5K_ZSX/(3Mb in >> 26 sec) >> >> Fast_Download() with regular size images: >> http://www.webpagetest.org/result/130822_C3_1008/ (3Mb in 28 sec) >> >> Tried to implement caching in nginx site config, but that disabled images >> completely, and I couldn't get it to work: >> >> #location ~* ^.+\.(jpg|jpeg|gif)$ { >> # root /home/www-data/web2py/applications/; >> # access_log off; >> # expires 30d; >> #} >> >> or >> >> #location ~* \.(jpg|jpeg|gif|png|css|js|ico|xml)$ { >> # access_log off; >> # log_not_found off; >> # expires 180d; >> #} >> >> Fast download used: >> def fast_download(): >> session.forget(response) >> cache.action(time_expire=604800)(lambda: 0)() >> >> # very basic security (only allow fast_download on >> your_table.upload_field): >> if not request.args(0).startswith("product.image"): >> return download() >> >> filename = os.path.join(request.folder,'uploads',request.args(0)) >> >> return response.stream(open(filename,'rb')) >> >> >> Segment of the code that displays the images: >> >> <div id="prod_img" itemprop="image"> >> {{if p.image:}} >> <a href="{{=product_link}}"> >> {{ >> #big_regex = re.compile('|'.join(map(re.escape, >> IMAGE_EXTENSIONS))) >> #tmb_image = big_regex.sub(INDEX_TMB, p.image) >> }} >> <img src="{{=URL('download', >> args=p.image, scheme=True, host=True)}}" >> alt="{{=product_name}}" href="{{=product_link}}" >> height="180px" width="160px"/> >> </a> >> <img data-src='{{=tmb_image}}' > >> {{pass}} >> </div> >> >> >> >> >> >> > -- --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
