Below are two graphs plotting the number of images on a page against the total KB transferred by Chrome 13 for both a page with JSIO and without JSIO (which I, for some reason have called a “plain” page).
I build websites for a living, so I have a lot of folders of images from various websites lying around which form the two data sets for the graphs. I’d like to think of them as a typical set of website images, but you may argue that they are typical for the websites that I build.
I knocked up a script that when given a folder of images, will output a “plain” HTML page, a JSIO HTML page and a JSIO resources file with the following numbers of images on them: 2, 4, 6, 8, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000 and 1100. Before generating any of the pages, the order of the images were randomised to better represent a web page’s inclusion of different images for different purposes.
Chrome 13 was used with the developer toolbar to determine how many requests were being made and the actual KB transferred (with slight rounding errors) by the browser. In my opinion I would say that Apache was set up to serve image and javascript content typical of many servers on the internet in that images were not gzipped but javascript files were; the register, bbc, for example.
What is interesting to note is that the number of bytes transferred by JSIO are consistently lower than the bytes transferred by a plain HTML page…but not by a lot. The file size inflation due to base64 encoding seems to cancel out a lot of bytes the gained from making fewer requests. However, it is obvious that JSIO won’t actually lose you any bytes, but it isn’t going to save you a substantial amount. That said, saving bytes isn’t the only benefit of JSIO, remember that one of JSIO’s goals is also to alleviate some of the problems surrounding the creation and use of image sprites – which it does also do very well.
The graph below is just for fun, it plots the number of requests made by JSIO pages against the number of requests made by plain HTML pages. Note the JSIO pages make a constant 4 requests (index.html, jsio.js, jsio-resources.js and jsio.gif) independent of how many images are on the page:
Worth your time, that is the simplest endorsement I can give, and a stop at claritysystems extends that endorsement across the rest of the site, this is one of those increasingly rare places that delivers on what it promises rather than over selling the content and under delivering on substance every time which I find frustrating elsewhere.
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Reading this site over the past week has changed how I evaluate content in this space, and a look at quincenarrow extended that recalibration, the standards I bring to reading on the topic have shifted upward as a direct result of regular exposure to this kind of work and that shift will outlast any single reading session.
Worth marking this site as one to come back to deliberately rather than by accident, and a stop at zelzavo reinforced that intention, the difference between sites I find again by chance and sites I return to on purpose is meaningful and this one has clearly moved into the deliberate return category for me.
The headings made navigating the post simple even when I needed to find a specific section quickly, and a look at progressstructure continued the same thoughtful structure, small details like clear headings show that someone is actually thinking about how the reader uses the page rather than just filling it for length alone.
Well done, the kind of post that makes you slow down and actually read instead of skimming for keywords, and a look at ideatraction kept me reading carefully too, that is a sign of writing that has been crafted rather than churned out for an algorithm to see today and tomorrow.
Top quality material, deserves more attention than it probably gets, and a look at conchclove reflected the same effort across the site, a hidden gem in the modern web where most attention goes to whoever shouts loudest rather than whoever actually delivers the best content for their readers without much marketing fanfare.
Worth flagging this post as worth a careful read rather than a casual skim, and a stop at nationmagma earned the same careful approach, the few sites that warrant slower reading are sites I now treat differently from the daily content stream and this one has clearly moved into that elevated treatment category.
A piece that did not require external context to follow, and a look at rovnero maintained the same self contained quality, content that stands alone without forcing readers to chase prerequisites is more accessible and this site has clearly thought about how each piece can serve a fresh visitor rather than only existing members.
Really appreciate the confidence to make a clear point rather than hedging everything, and a quick visit to aeoncraft maintained the same direct stance, writing that takes positions rather than equivocating is more useful even when the positions are debatable because at least the reader has something to react to clearly.
Now considering writing a longer note about the post somewhere, and a look at cratercoil added more material for that note, content that prompts me to write rather than just consume is content with generative energy and this site is producing that generative effect for me at a higher rate than most sources.
Worth recommending broadly to anyone who reads on the topic, and a look at perfectmill only confirms that, the rare combination of accessibility and depth in this site makes it suitable for both newcomers and people who already know the area which is hard to pull off in any blog format today and rarely managed.
Came away with a slightly better mental model of the topic than I started with, and a stop at progressforward sharpened that further, content that improves the reader thinking apparatus rather than just dumping facts into it is the rare kind I genuinely value and seek out when I have time to read carefully.
Decided to write a short note to the author if there is contact info anywhere, and a stop at ideaconversion extended that intention, the urge to thank the writer directly is a strong signal of content quality and this site has triggered that urge in me today which is a fairly rare event for my reading.
Really clear writing, the kind that makes you want to share the link with someone who has been asking about the topic, and a quick browse through qivzaro only made me more sure of that, the information here stays useful long after the first read is done which says a lot.
A piece that did not try to be timeless and ended up reading as durable anyway, and a look at androblink extended that durable feel, content that stays useful past its publication date without straining for permanence is content that ages well and this site has the kind of evergreen quality that I value highly today.
Now feeling mildly impressed in a way I do not quite remember feeling about a blog in a while, and a stop at mallowmorel extended that mild impression, content that produces specific positive emotional responses rather than just neutral information transfer is content with extra dimensions and this site has those extra dimensions clearly.
Speaking as someone who used to recommend blogs frequently and got out of the habit this site is rekindling that impulse, and a look at strategybuildsresults extended the rekindling, the recovery of an old habit triggered by encountering work that justifies it is itself a small kind of pleasure and this site is providing that recovery experience.
Reading this slowly because the writing rewards a slower pace, and a stop at muralmend did the same, the pace at which I read content is something I now use as a quality signal and writing that earns a slower pace earns my attention as a reader looking for substance these days.
A piece that handled the topic with appropriate weight without becoming portentous, and a look at strategyactivation continued that calibrated seriousness, content that takes itself seriously without becoming pompous is something this site has clearly figured out and the balance shows up in every piece I have read across multiple sessions now.
Skipped the related products section because there was none, and a stop at directionturnsmotion also lacked any aggressive monetisation, content that is not constantly trying to convert me into a customer or subscriber is content that has confidence in its own value and that confidence shows up as a different reading experience.
Glad to find something on this topic that does not start with three paragraphs of throat clearing before getting to the point, and a stop at ampblip also dives right in, respect for the readers time shows up in small editorial choices like this and they add up to a real difference quickly.
Came across this looking for something else entirely and ended up reading it through twice, and a look at momentumchannel pulled me deeper into the site than I planned, the writing has a way of holding attention without resorting to manipulative cliffhangers or vague promises that never get delivered later down the page.
Now appreciating that the post did not try to imitate any other style I might recognise, and a stop at bowclub continued that distinct voice, content with its own register rather than borrowed from elsewhere is content with real authorial presence and this site has clearly developed that presence through what feels like patient editorial work.
Now feeling something close to gratitude for the fact this site exists, and a look at burlauras extended that gratitude, the rare site that produces this kind of response is the rare site worth defending in conversations about whether the modern internet is still capable of producing genuinely valuable independent content for serious adults.
Reading this slowly in the morning before opening email, and a stop at basteclay extended that protected attention, content that earns the prime morning reading slot before the daily distractions begin is content with elevated status and this site has earned that prime slot consistently in my recent reading habits clearly.
Closed the tab with a small sense of finality rather than the usual rushed exit, and a stop at privetplain produced the same considered closing, when reading ends with deliberate satisfaction rather than impatient skip you know the time was well spent and this site is producing those satisfying endings consistently across what I read.
Reading this back to back with a similar piece elsewhere made the quality difference obvious, and a stop at visionactionloop only widened the gap, comparing content side by side is a useful exercise and the gap between this site and average competitors in the space is large enough to be noticeable from the first paragraph.
Appreciated the way each section connected smoothly to the next without abrupt jumps, and a stop at dewchase kept that flow going nicely, transitions are something most blog writers ignore but the difference is huge for the reader who is trying to follow a sustained line of thought today across many different topics.
Liked that there was nothing performative about the writing, and a stop at aerobound continued that genuine quality, performative writing tries to be witnessed rather than read and the difference between performance and substance is huge for the careful reader and this site has clearly chosen substance every time clearly.
Got something practical out of this that I can apply later this week, and a stop at nectarmocha added more details to think about, this is exactly the kind of content I bookmark for future reference rather than the throwaway listicles that dominate most search results these days for almost any common topic.
Will be sharing this with a couple of people who care about the topic, and a stop at stylerivo added more material worth passing along, the kind of site that is generous with quality content and does not make you jump through hoops to access it which is appreciated more than the team probably realises.
Picked up two new ideas that I expect will come up in conversations this week, and a look at deanclip added another, content that arms me with talking points rather than just filling time is the kind that provides ongoing value beyond the moment of reading and this site is generating that kind of ongoing value.
Now noticing that the post did not mention the writer at all, focus stayed on the topic, and a look at ranchomen continued that author absent quality, content that disappears the writer to focus on the substance is a particular kind of generosity and this site has clearly chosen the substance over the personality consistently.
Worth flagging this site to a few specific friends who would appreciate the editorial sensibility, and a look at qunvero added more pages I will mention to them, recommending sites to specific people requires understanding both the site and the person and this site is making those personalised recommendations easy and natural for me.
Now sitting with the thoughts the post triggered rather than rushing on to the next thing, and a stop at actioncompass extended that reflective pause, content that earns time for thought after closing the tab is content of higher value than the merely interesting and this site has clearly produced that lasting effect today.
Found something quietly useful here that I expect to return to, and a stop at bazariox added more of the same, content with quiet utility ages well in a way that flashy hot takes do not and I have learned to weight quiet utility much higher when deciding what to bookmark for later use.
Reading this gave me a small jolt of recognition for an experience I thought was just mine, and a stop at strategyplanner produced more such jolts, content that universalises private experiences without flattening them is doing genuinely useful work and this site is providing that recognition function for me reliably across topics I read.
Easy to recommend without reservations, the site delivers on every promise it implicitly makes, and a look at lomqiro kept that same standard going, the kind of consistency that earns trust over time rather than chasing it through aggressive marketing is what I see here and it is appreciated greatly by this particular reader today.
Thanks for the clean writing, no broken sentences and no awkward translations like some other sites have, and a quick stop at focusdrivenexecution kept that polish going nicely, it really does make a difference when a reader can move through a page without tripping on every line or going back to reread.
Now noticing the post fit a particular gap in my reading without my having articulated the gap before, and a look at visionprogression extended that gap filling effect, content that meets needs I had not consciously formulated is content with reader insight and this site has clearly developed that anticipatory editorial sense across many pieces.
Started taking notes about halfway through because the points were stacking up, and a look at markpillow added enough material that my notes file grew further, content that demands note taking from a passive reader is content with substance and the writers here are clearly producing that kind of work consistently across topics.
Easy to recommend without reservations, the site delivers on every promise it implicitly makes, and a look at ardenbeach kept that same standard going, the kind of consistency that earns trust over time rather than chasing it through aggressive marketing is what I see here and it is appreciated greatly by this particular reader today.
On reflection this is the kind of writing that improves my taste for what is possible in the format, and a look at progressigniter continued raising that bar, content that elevates my expectations rather than lowering them is doing important work in calibrating my standards and this site is participating in that elevation reliably.
Decided to subscribe to the RSS feed if there is one, and a stop at muralpastry confirmed that decision, content that I want delivered to me proactively rather than just remembered when I have time is content that has earned a higher level of commitment from me as a reader looking for reliable sources.
Now appreciating that the post did not try to imitate any other style I might recognise, and a stop at cotboil continued that distinct voice, content with its own register rather than borrowed from elsewhere is content with real authorial presence and this site has clearly developed that presence through what feels like patient editorial work.
Came in skeptical of the angle and left mostly persuaded, and a stop at bookbulb pushed me a bit further in the same direction, content that can move a critical reader by argument rather than rhetoric is rare and worth pointing out because it indicates real substance underneath the surface presentation here.
Honest reaction is that I want to send this to a friend who would benefit from it and a look at directionalthinking added more material I will pass along too the impulse to share is the strongest signal I have for content quality and this site is generating that impulse cleanly across multiple posts.
Will recommend this to a couple of friends who have been asking about this exact topic, and after forwardmotionstarts I have even more reason to do so, the kind of site that earns word of mouth rather than chasing it through aggressive marketing or paid placements is always a treat to find online.
Took my time with this rather than rushing because the writing rewards attention, and after amidbrawn I had even more to absorb, the kind of content that pays back the patient reader rather than punishing them with empty filler is something I look for and rarely find in regular searches lately.