<img alt="FastRSS" src="https://avencera.github.io/fast_rss/logo.svg">

Parse RSS feeds very quickly

<a href="https://hex.pm/packages/fast_rss"><img alt="Hex.pm" src="https://img.shields.io/hexpm/l/fast_rss"></a> <a href="https://hex.pm/packages/fast_rss"><img alt="Hex.pm" src="https://img.shields.io/hexpm/v/fast_rss"></a> <a href="https://hex.pm/packages/fast_rss"><img alt="Hex.pm" src="https://img.shields.io/hexpm/dt/fast_rss"></a> <a href="https://hexdocs.pm/fast_rss"><img alt="HexDocs.pm" src="https://img.shields.io/badge/hex-docs-purple.svg"></a>

<a href="#intro">Intro</a> | <a href="#compatibility">Compatibility</a> | <a href="#installation">Installation</a> | <a href="#usage">Usage</a> | <a href="#benchmark">Benchmarks</a> | <a href="#deploying">Deploying</a> | <a href="LICENSE.md">License</a>


Intro

Parse RSS feeds very quickly

  • This is rust NIF built using rustler
  • Uses the RSS rust crate to do the actual RSS parsing

Speed

Currently this is already much faster than most of the pure elixir/erlang packages out there. In benchmarks there are speed improvements anywhere between 6.12x - 50.09x over the next fastest package (feeder_ex) that was tested.

Compared to the slowest elixir options tested (feed_raptor, elixir_feed_parser), FastRSS was sometimes 259.91x faster and used 5,412,308.17x less memory (0.00156 MB vs 8423.70 MB).

See full benchmarks below:

Compatibility

FastRSS requires a minimum combination of Elixir 1.6.0 and Erlang/OTP 20.0, and is tested with a maximum combination of Elixir 1.11.1 and Erlang/OTP 22.0.

Installation

This package is available on hex.

It can be installed by adding fast_rss to your list of dependencies in mix.exs:

def deps do
  [
    {:fast_rss, "~> 0.3.4"}
  ]
end

You also need the rust compiler installed: https://www.rust-lang.org/tools/install

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

Usage

There is only one function it takes an RSS string and outputs an {:ok, map()} with string keys.

iex(1)>  {:ok, map_of_rss} = FastRSS.parse("...rss_feed_string...")
iex(2)> Map.keys(map_of_rss)
["categories", "cloud", "copyright", "description", "docs", "dublin_core_ext",
 "extensions", "generator", "image", "items", "itunes_ext", "language",
 "last_build_date", "link", "managing_editor", "namespaces", "pub_date",
 "rating", "skip_days", "skip_hours", "syndication_ext", "text_input", "title",
 "ttl", "webmaster"]

The docs can be found at https://hexdocs.pm/fast_rss.

Supported Feeds

Reading from the following RSS versions is supported:

  • RSS 0.90
  • RSS 0.91
  • RSS 0.92
  • RSS 1.0
  • RSS 2.0
  • iTunes
  • Dublin Core

Benchmark

HTML: https://avencera.github.io/fast_rss/

Benchmark run from 2020-02-22 05:23:47.524699Z UTC

System

Benchmark suite executing on the following system:

<tr> <th style="width: 1%; white-space: nowrap">Operating System</th> <td>macOS</td> </tr><tr> <th style="white-space: nowrap">CPU Information</th> <td style="white-space: nowrap">Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz</td> </tr><tr> <th style="white-space: nowrap">Number of Available Cores</th> <td style="white-space: nowrap">16</td> </tr><tr> <th style="white-space: nowrap">Available Memory</th> <td style="white-space: nowrap">32 GB</td> </tr><tr> <th style="white-space: nowrap">Elixir Version</th> <td style="white-space: nowrap">1.10.1</td> </tr><tr> <th style="white-space: nowrap">Erlang Version</th> <td style="white-space: nowrap">22.2.6</td> </tr>

Configuration

Benchmark suite executing with the following configuration:

<tr> <th style="width: 1%">:time</th> <td style="white-space: nowrap">30 s</td> </tr><tr> <th>:parallel</th> <td style="white-space: nowrap">1</td> </tr><tr> <th>:warmup</th> <td style="white-space: nowrap">5 s</td> </tr>

Statistics

Input: anxiety

Run Time

<tr> <th>Name</th> <th style="text-align: right">IPS</th> <th style="text-align: right">Average</th> <th style="text-align: right">Devitation</th> <th style="text-align: right">Median</th> <th style="text-align: right">99th&nbsp;%</th> </tr> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap; text-align: right">188.57</td> <td style="white-space: nowrap; text-align: right">5.30 ms</td> <td style="white-space: nowrap; text-align: right">±8.26%</td> <td style="white-space: nowrap; text-align: right">5.45 ms</td> <td style="white-space: nowrap; text-align: right">6.43 ms</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap; text-align: right">3.70</td> <td style="white-space: nowrap; text-align: right">269.92 ms</td> <td style="white-space: nowrap; text-align: right">±5.34%</td> <td style="white-space: nowrap; text-align: right">268.12 ms</td> <td style="white-space: nowrap; text-align: right">316.12 ms</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap; text-align: right">2.99</td> <td style="white-space: nowrap; text-align: right">334.01 ms</td> <td style="white-space: nowrap; text-align: right">±2.44%</td> <td style="white-space: nowrap; text-align: right">331.03 ms</td> <td style="white-space: nowrap; text-align: right">371.28 ms</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap; text-align: right">1.94</td> <td style="white-space: nowrap; text-align: right">515.72 ms</td> <td style="white-space: nowrap; text-align: right">±1.94%</td> <td style="white-space: nowrap; text-align: right">516.10 ms</td> <td style="white-space: nowrap; text-align: right">536.05 ms</td> </tr>

Comparison

<tr> <th>Name</th> <th style="text-align: right">IPS</th> <th style="text-align: right">Slower</th> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap;text-align: right">188.57</td> <td>&nbsp;</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap; text-align: right">3.70</td> <td style="white-space: nowrap; text-align: right">50.9x</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap; text-align: right">2.99</td> <td style="white-space: nowrap; text-align: right">62.99x</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap; text-align: right">1.94</td> <td style="white-space: nowrap; text-align: right">97.25x</td> </tr>

Memory Usage

<tr> <th>Name</th> <th style="text-align: right">Memory</th> <th style="text-align: right">Factor</th> </tr> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap">0.00156 MB</td> <td>&nbsp;</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap">17.21 MB</td> <td>11004.73x</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap">268.53 MB</td> <td>171693.91x</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap">313.30 MB</td> <td>200316.09x</td> </tr>

Input: ben

Run Time

<tr> <th>Name</th> <th style="text-align: right">IPS</th> <th style="text-align: right">Average</th> <th style="text-align: right">Devitation</th> <th style="text-align: right">Median</th> <th style="text-align: right">99th&nbsp;%</th> </tr> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap; text-align: right">83.95</td> <td style="white-space: nowrap; text-align: right">11.91 ms</td> <td style="white-space: nowrap; text-align: right">±10.29%</td> <td style="white-space: nowrap; text-align: right">12.23 ms</td> <td style="white-space: nowrap; text-align: right">16.17 ms</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap; text-align: right">13.33</td> <td style="white-space: nowrap; text-align: right">75.04 ms</td> <td style="white-space: nowrap; text-align: right">±4.38%</td> <td style="white-space: nowrap; text-align: right">74.21 ms</td> <td style="white-space: nowrap; text-align: right">89.72 ms</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap; text-align: right">3.52</td> <td style="white-space: nowrap; text-align: right">284.18 ms</td> <td style="white-space: nowrap; text-align: right">±3.89%</td> <td style="white-space: nowrap; text-align: right">283.83 ms</td> <td style="white-space: nowrap; text-align: right">324.08 ms</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap; text-align: right">0.48</td> <td style="white-space: nowrap; text-align: right">2078.76 ms</td> <td style="white-space: nowrap; text-align: right">±0.52%</td> <td style="white-space: nowrap; text-align: right">2076.27 ms</td> <td style="white-space: nowrap; text-align: right">2097.44 ms</td> </tr>

Comparison

<tr> <th>Name</th> <th style="text-align: right">IPS</th> <th style="text-align: right">Slower</th> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap;text-align: right">83.95</td> <td>&nbsp;</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap; text-align: right">13.33</td> <td style="white-space: nowrap; text-align: right">6.3x</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap; text-align: right">3.52</td> <td style="white-space: nowrap; text-align: right">23.86x</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap; text-align: right">0.48</td> <td style="white-space: nowrap; text-align: right">174.51x</td> </tr>

Memory Usage

<tr> <th>Name</th> <th style="text-align: right">Memory</th> <th style="text-align: right">Factor</th> </tr> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap">0.00155 MB</td> <td>&nbsp;</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap">27.86 MB</td> <td>17990.96x</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap">163.88 MB</td> <td>105811.88x</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap">1577.41 MB</td> <td>1018492.36x</td> </tr>

Input: daily

Run Time

<tr> <th>Name</th> <th style="text-align: right">IPS</th> <th style="text-align: right">Average</th> <th style="text-align: right">Devitation</th> <th style="text-align: right">Median</th> <th style="text-align: right">99th&nbsp;%</th> </tr> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap; text-align: right">32.98</td> <td style="white-space: nowrap; text-align: right">0.0303 s</td> <td style="white-space: nowrap; text-align: right">±7.62%</td> <td style="white-space: nowrap; text-align: right">0.0313 s</td> <td style="white-space: nowrap; text-align: right">0.0339 s</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap; text-align: right">4.94</td> <td style="white-space: nowrap; text-align: right">0.20 s</td> <td style="white-space: nowrap; text-align: right">±4.61%</td> <td style="white-space: nowrap; text-align: right">0.199 s</td> <td style="white-space: nowrap; text-align: right">0.24 s</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap; text-align: right">0.64</td> <td style="white-space: nowrap; text-align: right">1.57 s</td> <td style="white-space: nowrap; text-align: right">±1.50%</td> <td style="white-space: nowrap; text-align: right">1.57 s</td> <td style="white-space: nowrap; text-align: right">1.63 s</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap; text-align: right">0.127</td> <td style="white-space: nowrap; text-align: right">7.88 s</td> <td style="white-space: nowrap; text-align: right">±0.23%</td> <td style="white-space: nowrap; text-align: right">7.88 s</td> <td style="white-space: nowrap; text-align: right">7.90 s</td> </tr>

Comparison

<tr> <th>Name</th> <th style="text-align: right">IPS</th> <th style="text-align: right">Slower</th> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap;text-align: right">32.98</td> <td>&nbsp;</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap; text-align: right">4.94</td> <td style="white-space: nowrap; text-align: right">6.68x</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap; text-align: right">0.64</td> <td style="white-space: nowrap; text-align: right">51.86x</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap; text-align: right">0.127</td> <td style="white-space: nowrap; text-align: right">259.91x</td> </tr>

Memory Usage

<tr> <th>Name</th> <th style="text-align: right">Memory</th> <th style="text-align: right">Factor</th> </tr> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap">0.00153 MB</td> <td>&nbsp;</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap">109.73 MB</td> <td>71555.78x</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap">880.51 MB</td> <td>574178.95x</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap">6386.12 MB</td> <td>4164382.64x</td> </tr>

Input: dave

Run Time

<tr> <th>Name</th> <th style="text-align: right">IPS</th> <th style="text-align: right">Average</th> <th style="text-align: right">Devitation</th> <th style="text-align: right">Median</th> <th style="text-align: right">99th&nbsp;%</th> </tr> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap; text-align: right">407.08</td> <td style="white-space: nowrap; text-align: right">2.46 ms</td> <td style="white-space: nowrap; text-align: right">±9.83%</td> <td style="white-space: nowrap; text-align: right">2.41 ms</td> <td style="white-space: nowrap; text-align: right">3.16 ms</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap; text-align: right">56.52</td> <td style="white-space: nowrap; text-align: right">17.69 ms</td> <td style="white-space: nowrap; text-align: right">±6.14%</td> <td style="white-space: nowrap; text-align: right">17.37 ms</td> <td style="white-space: nowrap; text-align: right">22.51 ms</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap; text-align: right">8.90</td> <td style="white-space: nowrap; text-align: right">112.31 ms</td> <td style="white-space: nowrap; text-align: right">±4.12%</td> <td style="white-space: nowrap; text-align: right">111.93 ms</td> <td style="white-space: nowrap; text-align: right">127.60 ms</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap; text-align: right">1.59</td> <td style="white-space: nowrap; text-align: right">628.45 ms</td> <td style="white-space: nowrap; text-align: right">±1.60%</td> <td style="white-space: nowrap; text-align: right">626.71 ms</td> <td style="white-space: nowrap; text-align: right">656.74 ms</td> </tr>

Comparison

<tr> <th>Name</th> <th style="text-align: right">IPS</th> <th style="text-align: right">Slower</th> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap;text-align: right">407.08</td> <td>&nbsp;</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap; text-align: right">56.52</td> <td style="white-space: nowrap; text-align: right">7.2x</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap; text-align: right">8.90</td> <td style="white-space: nowrap; text-align: right">45.72x</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap; text-align: right">1.59</td> <td style="white-space: nowrap; text-align: right">255.83x</td> </tr>

Memory Usage

<tr> <th>Name</th> <th style="text-align: right">Memory</th> <th style="text-align: right">Factor</th> </tr> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap">0.00157 MB</td> <td>&nbsp;</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap">9.25 MB</td> <td>5886.17x</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap">80.42 MB</td> <td>51170.23x</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap">571.18 MB</td> <td>363425.45x</td> </tr>

Input: sleepy

Run Time

<tr> <th>Name</th> <th style="text-align: right">IPS</th> <th style="text-align: right">Average</th> <th style="text-align: right">Devitation</th> <th style="text-align: right">Median</th> <th style="text-align: right">99th&nbsp;%</th> </tr> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap; text-align: right">760.30</td> <td style="white-space: nowrap; text-align: right">1.32 ms</td> <td style="white-space: nowrap; text-align: right">±16.62%</td> <td style="white-space: nowrap; text-align: right">1.21 ms</td> <td style="white-space: nowrap; text-align: right">2.03 ms</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap; text-align: right">124.28</td> <td style="white-space: nowrap; text-align: right">8.05 ms</td> <td style="white-space: nowrap; text-align: right">±6.94%</td> <td style="white-space: nowrap; text-align: right">8.03 ms</td> <td style="white-space: nowrap; text-align: right">10.32 ms</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap; text-align: right">26.26</td> <td style="white-space: nowrap; text-align: right">38.09 ms</td> <td style="white-space: nowrap; text-align: right">±5.08%</td> <td style="white-space: nowrap; text-align: right">37.81 ms</td> <td style="white-space: nowrap; text-align: right">44.42 ms</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap; text-align: right">3.21</td> <td style="white-space: nowrap; text-align: right">311.16 ms</td> <td style="white-space: nowrap; text-align: right">±2.85%</td> <td style="white-space: nowrap; text-align: right">307.86 ms</td> <td style="white-space: nowrap; text-align: right">345.09 ms</td> </tr>

Comparison

<tr> <th>Name</th> <th style="text-align: right">IPS</th> <th style="text-align: right">Slower</th> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap;text-align: right">760.30</td> <td>&nbsp;</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap; text-align: right">124.28</td> <td style="white-space: nowrap; text-align: right">6.12x</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap; text-align: right">26.26</td> <td style="white-space: nowrap; text-align: right">28.96x</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap; text-align: right">3.21</td> <td style="white-space: nowrap; text-align: right">236.57x</td> </tr>

Memory Usage

<tr> <th>Name</th> <th style="text-align: right">Memory</th> <th style="text-align: right">Factor</th> </tr> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap">0.00157 MB</td> <td>&nbsp;</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap">4.28 MB</td> <td>2726.19x</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap">35.88 MB</td> <td>22829.92x</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap">274.98 MB</td> <td>174963.99x</td> </tr>

Input: stuff

Run Time

<tr> <th>Name</th> <th style="text-align: right">IPS</th> <th style="text-align: right">Average</th> <th style="text-align: right">Devitation</th> <th style="text-align: right">Median</th> <th style="text-align: right">99th&nbsp;%</th> </tr> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap; text-align: right">19.19</td> <td style="white-space: nowrap; text-align: right">0.0521 s</td> <td style="white-space: nowrap; text-align: right">±9.19%</td> <td style="white-space: nowrap; text-align: right">0.0546 s</td> <td style="white-space: nowrap; text-align: right">0.0635 s</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap; text-align: right">0.93</td> <td style="white-space: nowrap; text-align: right">1.07 s</td> <td style="white-space: nowrap; text-align: right">±2.49%</td> <td style="white-space: nowrap; text-align: right">1.07 s</td> <td style="white-space: nowrap; text-align: right">1.15 s</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap; text-align: right">0.53</td> <td style="white-space: nowrap; text-align: right">1.88 s</td> <td style="white-space: nowrap; text-align: right">±1.22%</td> <td style="white-space: nowrap; text-align: right">1.89 s</td> <td style="white-space: nowrap; text-align: right">1.92 s</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap; text-align: right">0.0797</td> <td style="white-space: nowrap; text-align: right">12.54 s</td> <td style="white-space: nowrap; text-align: right">±1.61%</td> <td style="white-space: nowrap; text-align: right">12.44 s</td> <td style="white-space: nowrap; text-align: right">12.77 s</td> </tr>

Comparison

<tr> <th>Name</th> <th style="text-align: right">IPS</th> <th style="text-align: right">Slower</th> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap;text-align: right">19.19</td> <td>&nbsp;</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap; text-align: right">0.93</td> <td style="white-space: nowrap; text-align: right">20.59x</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap; text-align: right">0.53</td> <td style="white-space: nowrap; text-align: right">36.11x</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap; text-align: right">0.0797</td> <td style="white-space: nowrap; text-align: right">240.68x</td> </tr>

Memory Usage

<tr> <th>Name</th> <th style="text-align: right">Memory</th> <th style="text-align: right">Factor</th> </tr> <tr> <td style="white-space: nowrap">fast_rss</td> <td style="white-space: nowrap">0.00154 MB</td> <td>&nbsp;</td> </tr> <tr> <td style="white-space: nowrap">feeder_ex</td> <td style="white-space: nowrap">140.58 MB</td> <td>91220.55x</td> </tr> <tr> <td style="white-space: nowrap">elixir_feed_parser</td> <td style="white-space: nowrap">1018.78 MB</td> <td>661058.28x</td> </tr> <tr> <td style="white-space: nowrap">feed_raptor</td> <td style="white-space: nowrap">8424.44 MB</td> <td>5466379.81x</td> </tr>

Deploying

Deploying rust NIFs can be a little bit annoying as you have to install the rust compiler. If you are having trouble deploying this package make an issue and I will try and help you out.

I will then add it to the FAQ below.

Q. How do I deploy using an Alpine Dockerfile?

A. I recommend using a multi-stage Dockerfile, and doing the following

  1. On the stages where you build all your deps, and build your release make sure to install build-base and libgcc:

    # This step installs all the build tools we'll need
    RUN apk update && \
        apk upgrade --no-cache && \
        apk add --no-cache \
        git \
        curl \
        build-base \
        libgcc  && \
        mix local.rebar --force && \
        mix local.hex --force
  2. Install the rust compiler and allow dynamic linking to the C library by setting the rust flag

    # install rustup
    RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
    ENV RUSTUP_HOME=/root/.rustup \
        RUSTFLAGS="-C target-feature=-crt-static" \
        CARGO_HOME=/root/.cargo  \
        PATH="/root/.cargo/bin:$PATH"
  3. On the stage where you actually run your elixir release install libgcc:

    ################################################################################
    ## STEP 4 - FINAL
    FROM alpine:3.11
    ENV MIX_ENV=prod
    RUN apk update && \
        apk add --no-cache \
        bash \
        libgcc \
        openssl-dev
    COPY --from=release-builder /opt/built /app
    WORKDIR /app
    CMD ["/app/my_app/bin/my_app", "start"]

License

FastRSS is released under the Apache License 2.0 - see the LICENSE file.