The train we took was late, so we arrived in the middle of Substack's talk. It was a general overview of the various tools he currently works on. It was original, without slides, but with lots of code. He showed how to use the browser appcache with versioning to make an infinite scaling application. He talked about hyperboot, keyboot & forkdb, helpful libraries he wrote to simplify app caching. It was interesting to see how a - not so well known - existing technology like appcache file can be used to lighten a webserver.
After his presentation, he said that in programming environment it's the ecosystem that matters, not the syntax and If you don't have a job, you get busy with everything else - that made all the audience laugh.
Then Charlie Robbins talked about how we can use
npm to graph module dependencies.
Graphs can be used to know which modules are the most used in production, or which version is the most used. He left me unsatisfied about how we can make these graphs ourselves, and other example of concrete application of this data mining. It was very theoretical speech without concrete example.
After a the lunch with good French cheese, verrines & delicious deserts, lightning talks began with presentation of:
Talks started again with Julien Lecomte, lead of YUI. He was surprised to be described as lead of YUI because when he arrived at Yahoo! they decided to deprecate YUI. Julien told us what YUI2 will look like. They bet on the adoption of ES6 in the beginning of 2015 & YUI will use ReactJS. For older browsers, they provide a CDN for shim (polyfill service) that will provide shims depending on the User Agent of the browser: no useless polyfill will be loaded.
With a warm Spanish accent, Soledad Penadés presented the WebAudio API & openmusic. Even if the presentation was interesting, I think that only few people of the audience will be interested by using such advanced features of WebAudio.
The CEO of NodeSource, Joe McCann introduced 2 or 3 tricks to improve NodeJS performance. He began with a brief explanation of "How to not make V8 think", like avoiding megamorphic function, type change for a variable, mixing type in array, etc. Then Joe introduced V8 flags like
allow-natives-syntax to micro-tune your nodeJS code.
An awaited speaker was Paul O’Shannessy, the maintainer of ReactJs. His talk was about how React was created & its future for the version 1.0 (ES7, API stabilisation, CSS in JS, Web workers, layout & animations...). For new comer of React like me, it wasn't the talk I expected. Paul spoke for regular users of React ; I think he targeted few people in the audience.
Finally, Yehuda Katz the creator of emberjs spoke about independent open source software. He told that if we don't die, we can retry later. Developers should stay healthy, make real apps & diversify the core team of their projects (with non techy). Maintainers should communicate their vision to the community, ignore the haters & listen to the community. Lot of common-sense tips that we couldn't listen to the end, because we had to take our train.
The DotJS website promotes stars, not the content of they talk, that's why we can be disappointed at the end of the event.