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:



Liked that the post left some questions open rather than pretending to settle everything, and a stop at arialcamp continued that intellectual honesty, content that respects the limits of its own claims is more trustworthy than content that overreaches and this site has clearly figured out which positions it can defend confidently.
Without overstating it this is a quietly excellent post, and a look at vuzmixo extended that quiet excellence, content that earns superlatives without demanding them through marketing language is content that has truly earned them through the substance and this site has clearly produced work in that earned excellence category today.
Worth your time, that is the simplest endorsement I can give, and a stop at tavzoro 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.
Now noticing that the post benefited from being neither too short nor too long for its content, and a look at boneclog continued that calibration of length, sites that match length to content rather than padding to hit some target are sites that respect both their material and their readers and this site does both.
Approaching this site through a casual link click and being surprised by what I found, and a look at qonzavi extended the surprise, the rare experience of stumbling into excellent independent content rather than predictable mediocrity is one of the actual remaining pleasures of casual web browsing and this site provided it cleanly.
A piece that did not require external context to follow, and a look at zorlumo 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.
Easily one of the better explanations I have read on the topic, and a stop at molnexo pushed it even higher in my mental ranking of useful resources, the kind of site that beats the average not by trying harder but by simply caring more about what it puts out daily which always shows.
Genuinely good work, the kind that holds up over multiple readings without losing its appeal, and a stop at luxrova kept that going, definitely a site I will be returning to and probably mentioning to others who work in or care about this particular area of interest today and in coming weeks.
Felt the writer did the homework before publishing, the references hold up, and a look at luxrivo continued that documented care, content with traceable claims rather than vague assertions is the kind I trust and the lack of bald assertion in this post is one of its quietly impressive qualities for me.
A piece that ended with a clean landing rather than fading out, and a look at prowlocean maintained the same crisp conclusions, endings that resolve rather than dissolve are a sign of careful structural thinking and this site has clearly invested in how its pieces conclude rather than letting them simply run out of energy.
Liked how the writer used real examples instead of theoretical ones to make the points stick, and a stop at octanenebula added even more concrete examples, this is the kind of practical approach that respects readers who actually want to apply what they learn rather than just nodding along passively without doing anything useful.
Over the course of reading several posts here a pattern of quality has emerged, and a stop at milknorth confirmed the pattern, the difference between sites that hit quality occasionally and sites that hit it consistently is huge and this site has clearly demonstrated the consistent kind through what I have read this morning.
Now adjusting my mental list of reliable sites for this topic, and a stop at visionalignment reinforced the adjustment, the small ongoing curation work of maintaining trusted sources is one of the actual practical activities of careful reading and this site has earned a permanent place on my list for this particular subject.
A genuine pleasure to find a site that publishes at a sustainable cadence rather than chasing the daily content treadmill, and a look at intentionalmomentum confirmed the careful publication rhythm, sites that prioritise quality over frequency are rare and this one has clearly chosen the slower pace which I appreciate as a reader.
Really appreciate this kind of writing, no shouting and no clickbait headlines just steady useful content, and a quick look at cipherbow kept that going, definitely a site I will be returning to whenever I need a sensible take on similar topics in the days ahead and also during slower work weeks.
Found something new in here that I had not seen explained this way before, and a quick stop at cartmixo expanded the idea even further, the kind of writing that nudges your thinking forward a bit without forcing the issue is exactly what I look for online today and rarely actually find anywhere.
Good clean post, no errors and no awkward phrasing that breaks the reading flow, and a stop at palettemauve kept the same standard, definitely the kind of editorial care that earns a return visit because it tells me the writer is paying attention to details that matter to readers rather than just rushing publication.
Honest opinion is that this is the kind of post that builds long term trust with readers, and a look at cryptbeach reinforced that perception, the slow accumulation of trust through consistent quality is the only sustainable way to build a real audience and this site is clearly playing that long game.
Magnificent site. Plenty of useful information here. I am sending it to several friends ans also sharing in delicious. And obviously, thanks for your sweat!
Once I had read three posts the editorial pattern was clear, and a look at upperspruce confirmed the pattern from a fourth angle, sites where the underlying approach reveals itself through accumulated reading rather than being announced are sites with real depth and this one has that quality clearly visible across multiple pieces consistently.
Without overstating it this is a quietly excellent post, and a look at pippierce extended that quiet excellence, content that earns superlatives without demanding them through marketing language is content that has truly earned them through the substance and this site has clearly produced work in that earned excellence category today.
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Now recognising that the post handled the topic with appropriate technical precision without becoming dry, and a stop at torqavi continued that balance, technical precision and readability are often in tension and this site has clearly figured out how to maintain both at once which is one of the harder editorial achievements in the form.
Started reading and ended an hour later without realising the time had passed, and a look at xinvexa produced the same time dilation effect, when content makes time feel different the writer has achieved something well beyond the average and this site is producing that experience for me reliably across multiple readings.
Really like the way the post resists reaching for cliches that would have made it feel generic, and a quick visit to qorlino kept that fresh feel going, original phrasing and unexpected metaphors are signs that the writer is actually thinking rather than just stitching together familiar phrases into the appearance of content.
Useful enough to recommend to several people I know who would appreciate it, and a stop at zorvilo added more material I will pass along too, the kind of writing that earns word of mouth is the kind that actually delivers on its promises which is what this site does without any drama or fanfare attached.
A piece that was confident enough to leave some questions open rather than forcing closure, and a look at xarmizo continued that intellectual honesty, content that admits the limits of its scope is more trustworthy than content that pretends to total understanding and this site has the right calibration on certainty consistently.
Picked this site to mention to a colleague who would benefit, and a look at molvani added more material I will pass along, recommending sites to colleagues is a higher bar than recommending to friends because the professional context demands more careful curation and this site cleared the professional bar without me having to think.
Halfway through I knew I would finish the post, and a stop at luzqiro also held me through to the end, content that signals its quality early and then sustains it is content with real internal consistency and this site has clearly figured out how to maintain quality from opening sentence through to closing thought.
Picked up two new ideas that I expect will come up in conversations this week, and a look at mastlarch 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.
Felt a small spark of recognition when the post named something I had been struggling to articulate, and a look at cabinbull produced more such moments, the rare service of giving readers language for fuzzy intuitions is one of the higher values that good writing can provide and this site offered several today instances.
Thanks for putting this online without locking it behind email signups or paywalls, and a quick visit to hekfox kept that open feel going, content that trusts the reader to come back rather than gating access is the kind of approach I will reward with regular return visits over time happily.
Took some notes for a project I am working on, and a stop at astrobrunch added more raw material to those notes, content that contributes to my own creative work rather than just being interesting in the moment is the kind I value most and the kind I will keep coming back to repeatedly.
Looking at this objectively the editorial quality is hard to deny even setting aside personal taste, and a stop at zulvexa maintained the same objective quality, the gap between what I personally enjoy and what is objectively well crafted exists and this site clears both bars simultaneously which is rarer than it sounds.
My time on this site has now extended past what I had budgeted, and a stop at minimparch keeps extending it further, content that overstays its budget in my schedule is content that has earned the extra time and this site has been earning extra time across multiple visits to the point where my schedule needs adjustment.
Worth recognising that this site does not chase the daily news cycle, and a stop at octanepinto confirmed the longer publication arc, sites that resist the pressure to comment on every passing event are sites with genuine editorial discipline and this one has clearly chosen depth over volume which I respect deeply.
Came in skeptical of the angle and left mostly persuaded, and a stop at pebbleoboe 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.
Good quality through and through, no rough edges and no signs of being rushed, and a quick look at ideastomotion kept the same polish going, the kind of site that respects its own brand by maintaining consistency across pages which is something I always appreciate as a reader looking for trustworthy information online today.
Started reading skeptically because the headline seemed overconfident, and the post earned the headline by the end, and a look at bauxable continued that pattern of earning its claims, sites that can back up their headlines without overpromising are rare and this one has clearly developed editorial calibration on that front consistently.
Now adding the homepage to my regular check rotation rather than waiting for individual links to find me, and a stop at cartrivo confirmed the rotation upgrade, the move from passive discovery to active checking is a vote of confidence in a sites ongoing quality and this site has earned that active engagement clearly.
More original than the recycled takes I keep finding on the topic elsewhere, and a quick look at claritychanneling confirmed it, the kind of site that has its own voice rather than echoing whatever is trending which makes it stand out as a refreshing change from the usual rotation of generic content I see daily.
Appreciate the practical examples, they made the abstract points easier to grasp, and a stop at mexqiro added more of the same, this site clearly understands that real examples beat empty theory every single time which is the mark of a writer who knows their audience well and respects their time.
Took me back a step or two on an assumption I had been making, and a stop at civiccask pushed that reconsideration further, writing that gently corrects the reader without being aggressive about it is a rare diplomatic skill and the team here clearly knows how to land critical points without turning readers off.
Took a quick scan first and then went back to read properly because the post deserved it, and a stop at larksmemo kept me reading carefully too, the kind of writing that earns a slower second pass rather than getting skimmed and forgotten is something I value highly when I happen to find it.
Now noticing how rare it is to find a site that does not feel rushed, and a look at molzari extended that calm pace, content produced without time pressure has a different quality than content shipped to meet a deadline and this site reads as written without urgency which produces a different and better experience for readers.
Reading this prompted me to send the link to two different people for two different reasons, and a stop at urbanrivo provided ammunition for a third share, content that suits multiple audiences without being generic enough to be useless to any of them is genuinely valuable and this site has that multi audience quality clearly.
Did not expect much when I clicked through but ended up reading the whole thing carefully, and a stop at qorzino kept that engagement going, sometimes the unassuming sites turn out to deliver more than the flashy ones which is something I have learned to look out for over time online lately and across topics.
Skipped breakfast still reading this and finished hungry but satisfied, and a stop at zulmora kept me past breakfast time, content that displaces basic biological needs is content with serious attentional pull and the writers here are clearly capable of producing that level of engagement which is genuinely impressive these days.