We have seen various benchmarks and charts on conferences. Even minor dependency might grow your bundle or compilation time. Happily, in Angular 9.1, ngcc is smart enough to run on-demand, not every compilation and not every post-install change. This resulted in awkward workarounds where artificial components were created purely to hold text that would be translated. 5s every-change makes a dramatic difference in development experience. We develop this codebase for 2 years.
As a result, I was able to increase the performance of an application under heavy load by a huge amount by adding as little overhead as possible using Typescript’s decorators. For us it costs 40–50s for Angular 9.0 and 20–30s for Angular 9.1. The difference grows with number of components in a library — clearly visible on component library weight (we can learn how ngcc works in Architecture Design document). But there were some shortcomings to this approach. Currently the use of $localize in application code is not yet publicly supported or documented. Hence, Ivy enablement is going to cause different improvements. → clap button below️ so more people can see this→ follow me on Twitter (@constjs) so you won’t miss future posts: A newsletter with focus on advanced web development, written and curated by Max Koretskyi and inDepth.dev team. Utility libraries have nothing to do with Ivy, the same with Angular Services.
I mentioned libraries, those need to be re-compiled with ngcc tool before a build. Thus, make sure you’re doing bundle analysis occasionally (preferably, on a regular basis!). We already gained build time benefits. No! Initial plan for Angular 10 is to work without ngcc. Demo. You might get impression that results are not worth upgrade. It’s expected to speed-up by 25–50%. Here is my reasoning: Differential loading (ES2015+ES5) build used to be slower for obvious reasons, it needed to generate two packages of the same code. See our i18n guide for more information. We have a new TestBed implementation that allows to cache component definitions without the need to re-compile every test run. But you need to act smart. This is good, but what is going on with main.js? Wait, is it even possible with all breaking changes?
We compile ES2015 or ES5, never both. I conducted tests on Angular 9.0.6 with Ivy: enabled and disabled. Those results are worth waiting for, especially we’re at the process of migration to full Ivy potential, and we can expect further improvements. In this case around 5 seconds. This article explains the benefits and some of the… Angular team tries to save every bit of code in runtime, whereas e.g. Did you perform similar benchmarks? I compare ES5 and ES2015 bundles where it makes sense. In the next blogpost, I’ll present a few tips on migrating to Angular 9 and 9.1 with a single-file commit. 48702 . I’m thankful we’re not going to split community into Post-Ivy and Pre-Ivy era, the way Python 2 vs Python 3 or Angular 1 vs Angular 2+ did.
Utility libraries have nothing to do with Ivy, the same with Angular Services. Also the post-processing of the translations is very fast since the tool only has to parse the code for $localize tagged strings.
Nothing like that. What left us: Angular framework and component library. Lazy loaded chunks are purely compiled with Ivy, effecting smaller output of gzipped and minified bundles by 20–30%! I’m using full build metric for the general sum of improvements delivered by the new compiler. ngcc re-compiles node_modules libs with Ivy compiler. In this article, we’re going to dive into bundle-size and compilation speed insights. it is still able to identify and translate the tagged message. Hence, Ivy enablement is going to cause different improvements. I mentioned libraries, those need to be re-compiled with ngcc tool before a build. I compare ES5 and ES2015 bundles where it makes sense. For example, the following code: The result is that all references to $localize are removed, and there is zero runtime cost to rendering the translated text. Is it bad? In this article, we're going to take a look at what Ivy is, how it works, and how you can stay up to date on its progress. Take a look, ag-Grid: THE BEST ANGULAR GRID IN THE WORLD, Vue Components — Dynamic and Async Components, JavaScript async/await: The Good Part, Pitfalls and How to Use, Set Up Scheduled Tests With TestCafe, Gitlab CI, and Alerts on Slack, components / services that couldn’t be lazy loaded, Currently libraries are compiled in JIT-mode, then re-compiled with, Angular 10: libraries are going to publish code compiled by Ivy with AOT, Then, we won’t need compatibility layers for components with, AOT-compiled output is additional bonus, making libraries even smaller, 4 instead of 6 minutes for differential loading, 3 minutes 40 seconds instead 4 minutes 45 seconds for regular ES5 build, Small, lazy-loaded module: 5–7 seconds instead of 10–12s, Change in HTML in core components: 12–13s instead of 20s. ngcc adds compatibility layer that makes components little bigger. It meant to be much smaller because of better tree-shaking of Angular! Angular 8, Angular 10 and Angular 11 performance and Benchmark Google Lighthouse performance does not make sense it depends on your optimization which depends on the complexity of the project too. The idea is that strings that need to be translated are “marked” using this tag: This $localize identifier can be a real function that can do the translation at runtime, in the browser.
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