To run this benchmark you need python and a local webserver, for instance local-web-server does the trick.

1. Generate the modules: rm -rf out/ && python3 ./gen.py
2. Start webserver: ws
3. Run the benchmark:

testing/xvfb.py out/release/chrome http://localhost:8000/out/prefetch-0.html

The out/ directory contains various version of the main app with different degrees of module prefetching and top-level includes.

gen.py can be used with simple expansion rules to generate arbitrary trees. Let's consider the following simple tree:

   A
 / | \
B  A  C
 / | \
B  A  C

It can be generated with ./get.py --depth=2 --rules="A:BAC". Notes:

• A is the default starting axiom.
• A module name consist of a single character other than , and :.

Additionally you can specify the size of each generated module with --sizes:

./get.py --depth=2 --rules="A:AB" --sizes="A:12k,B:1m,C:1k"

• ~250 small modules: --depth=70 --rules="A:ABCD" --sizes="A:1k,B:1k,C:1k,D:1k"
• ~250 small modules: --depth=70 --rules="A:BCDA" --sizes="A:1k,B:1k,C:1k,D:1k"
• ~1200 very small modules: --depth=8 --rules="A:ABCDA"
• ~210 large modules: --depth=70 --rules="A:BAC" --sizes="A:100k,B:1m,C:300k"