add collection benchmarking project

Author: julienrf

gsoc/2017.md

@@ -171,7 +171,20 @@ the remaining 21 Savina benchmarks using the Reactors framework.
 
 Supervised by [@axel22](https://github.com/axel22)
 
-*... Mentors: please insert your projects here. You can use the following template ...*
+### Benchmarking the new collections
+
+The standard collections are in the process of being redesigned. We want to
+be sure that the new implementation is as efficient as the current one, if not
+more efficient. A simple benchmark suite has been implemented but it lacks nice
+features like performance regression reports via interactive charts. This project
+would require the student to be familiar with benchmarking (especially within
+the JVM) and web-based visualization libraries such as d3.
+
+[https://github.com/scala/collection-strawman](https://github.com/scala/collection-strawman)
+
+Supervised by [@julienrf](https://github.com/julienrf)
+
+*... Mentors: please insert your projects here. You can use the following template and submit a PR [here](https://github.com/scala/scala-lang). Note that student applications will end on April 3, 2017 ...*
 
 ### *Project name*