FastHTML
A C Node wrapping lexbor. Primarily used with FastSanitize.
- Available as a hex package:
{:fast_html, "~> 2.0"} - Documentation
Compiling
- GNU Make
- C Compiler
- Erlang 22.0+ with development headers
- (optional) lexbor 2.2.0+
If you want to use a system installation of lexbor, you can set WITH_SYSTEM_LEXBOR=1 during compilation time. By default it will used the vendored version present at c_src/lexbor.
Benchmarks
The following table provides median times it takes to decode a string to a tree for html parsers that can be used from Elixir. Benchmarks were conducted on a machine with an AMD Ryzen 9 3950X (32) @ 3.500GHz CPU and 32GB of RAM. The mix fast_html.bench task can be used for running the benchmark by yourself.
| File/Parser | fast_html (Port) | mochiweb_html (erlang) | html5ever (Rust NIF) | Myhtmlex (NIF)¹ |
|---|---|---|---|---|
| document-large.html (6.9M) | 125.12 ms | 1778.34 ms | 395.21 ms | 327.17 ms |
| document-small.html (25K) | 0.50 ms | 2.76 ms | 1.72 ms | 1.19 ms |
| fragment-large.html (33K) | 0.93 ms | 4.78 ms | 2.34 ms | 2.15 ms |
| fragment-small.html² (757B) | 44.60 μs | 42.13 μs | 43.58 μs | 289.71 μs |
Full benchmark output can be seen in this snippet
- Myhtmlex has a C-Node mode, but it wasn't benchmarked here because it segfaults on
document-large.html - The slowdown on
fragment-small.htmlis due to Port overhead. Unlike html5ever and Myhtmlex in NIF mode,fast_htmlhas the parser process isolated and communicates with it over stdio, so even if a fatal crash in the parser happens, it won't bring down the entire VM.
Contribution / Bug Reports
- Please make sure you do
git submodule updateafter a checkout/pull - The project aims to be fully tested