Merge pull request #1265 from lqd/stm32f4-feature

Switch the `stm32f4` benchmark to a quicker default feature

Author: rylev

collector/benchmarks/README.md

@@ -38,6 +38,8 @@ They mostly consist of real-world crates.
 - **serde-1.0.136**: A serialization/deserialization crate. Used by many other
   Rust programs.
 - **stm32f4-0.14.0**: A crate that has many thousands of blanket impl blocks.
+  It uses cargo features to enable large portions of its structure and is
+  built with `--features stm32f410` to have faster benchmarking times.
 - **syn-1.0.89**: A library for parsing Rust code. An important part of the Rust
   ecosystem.
 - **unicode-normalization-0.1.19**: Unicode character composition and decomposition

collector/benchmarks/stm32f4-0.14.0/perf-config.json

@@ -1,4 +1,4 @@
 {
-  "cargo_opts": "--features=stm32f405",
+  "cargo_opts": "--features=stm32f410",
   "category": "primary"
 }