Benchmarks

Please read the entire file, there are some considerations that explain the results at the end of this page

In this directory you can find some code to measure the performance of asm-dom. In particular you can find the results of asm-dom and snabbdom, this allows you to make a comparison between the performance of asm-dom and a js virtual DOM. Before jumping to conclusions please read this list, this underline some important aspects:

• asm-dom aims to let you write high perfomance SPA (Single page applications) in C++ that will be compiled into WebAssembly. This means that they will run until 4 times faster. However asm-dom needs to update the DOM and unfortunately, at the moment, this involves javascript. So, the internals of asm-dom will call js for you and they will deal with the overhead of the binding between JS and WASM. In the future, without these bindings, asm-dom will be even more powerful, however, you have to be aware that, for this reason, the results that you will see later won't represent the performance of your entire app, your code, your algorithms and so on will be a lot faster (they will be like the second test where there are no js calls). asm-dom will be the only place that will deal with the overhead of the js <-> wasm communication.

• asm-dom does not leave garbage after the execution of its tests, while snabbdom might leave some garbage that need to be collected by the garbage collector.

There are 4 tests at the moment:

• create nodes: this test create 700 nodes (100 nodes with 3 children, the last of which has 3 more children). Please note that, as we said before, in the case of asm-dom, this test creates but also destroys the nodes. While, in the case of snabbdom, the deletion is managed by the garbage collector and it is not measured.

• diff equal nodes: this test runs the patch function 100 times with 2 equal nodes (2 nodes with 100 children, each of them has 1 child), so, the DOM will be not updated.

• diff different nodes: this test runs the patch function 100 times with 2 nodes with different attributes (2 nodes with 100 children, each of them has 1 child), so, the DOM will be updated.

• add/remove nodes: this test runs the patch function 100 times with 2 nodes, one with 100 children and one without children.

Here you can find the tests (lower is better) runned on a MacBook Pro (Retina, 13-inch, Late 2013), Processor 2,4 GHz Intel Core i5, Memory 8 GB 1600 MHz DDR3:

Firefox 59.0.2 (64 bit)

| library | create nodes | diff equal nodes | diff different nodes | add/remove nodes | | --- | --- | --- | --- | --- | | asm-dom | 0.0000 | 2.0000 | 34.0000 | 32.0000 | | snabbbom | 0.0000 | 12.0000 | 42.0000 | 44.0000 |

Chrome 66.0.3359.181 (64-bit)

| library | create nodes | diff equal nodes | diff different nodes | add/remove nodes | | --- | --- | --- | --- | --- | | asm-dom | 0.9000 | 3.2000 | 16.4000 | 15.1000 | | snabbbom | 0.5000 | 4.6000 | 8.7000 | 13.3000 |