Sitemapper

Sitemapper is an Elixir library for generating XML Sitemaps.

It’s designed to generate large sitemaps while maintaining a low memory profile. It can persist sitemaps to Amazon S3, disk or any other adapter you wish to write.

Benchmarks

sitemapper is about 50% faster than fast_sitemap. In the large scenario below (1,000,000 URLs) sitemapper uses ~50MB peak memory consumption, while fast_sitemap uses ~1000MB.

$ MIX_ENV=bench mix run bench/bench.exs
Operating System: macOS
CPU Information: Intel(R) Core(TM) i7-4870HQ CPU @ 2.50GHz
Number of Available Cores: 8
Available memory: 16 GB
Elixir 1.9.1
Erlang 22.0.4

Benchmark suite executing with the following configuration:
warmup: 2 s
time: 10 s
memory time: 0 ns
parallel: 1
inputs: large, medium, small
Estimated total run time: 1.20 min

Benchmarking fast_sitemap - simple with input large...
Benchmarking fast_sitemap - simple with input medium...
Benchmarking fast_sitemap - simple with input small...
Benchmarking sitemapper - simple with input large...
Benchmarking sitemapper - simple with input medium...
Benchmarking sitemapper - simple with input small...

##### With input large #####
Name                            ips        average  deviation         median         99th %
sitemapper - simple          0.0353        28.32 s     ±0.00%        28.32 s        28.32 s
fast_sitemap - simple        0.0223        44.76 s     ±0.00%        44.76 s        44.76 s

Comparison:
sitemapper - simple          0.0353
fast_sitemap - simple        0.0223 - 1.58x slower +16.45 s

##### With input medium #####
Name                            ips        average  deviation         median         99th %
sitemapper - simple            0.35         2.85 s     ±0.57%         2.85 s         2.87 s
fast_sitemap - simple          0.23         4.28 s     ±0.46%         4.28 s         4.30 s

Comparison:
sitemapper - simple            0.35
fast_sitemap - simple          0.23 - 1.50x slower +1.43 s

##### With input small #####
Name                            ips        average  deviation         median         99th %
sitemapper - simple           32.00       31.25 ms     ±8.01%       31.20 ms       37.22 ms
fast_sitemap - simple         21.55       46.41 ms     ±6.96%       46.26 ms       56.36 ms

Comparison:
sitemapper - simple           32.00
fast_sitemap - simple         21.55 - 1.49x slower +15.16 ms