add links to compared approaches in README

Author: jaja360

README.md

@@ -1,7 +1,21 @@
 # float_serialization_benchmark
 
-This repository contains benchmarking code for 
-
+This repository contains benchmarking code for floating-point serialization.
+The goal is to compare different approaches to serializing floating-point
+numbers, i.e., converting them from an IEEE 754 binary representation to a
+string decimal representation.
+
+Currently, the following approaches are compared:
+    - [std::to_string](https://en.cppreference.com/w/cpp/string/basic_string/to_string)
+    - [fmt::format](https://github.com/fmtlib/fmt)
+    - [netlib](https://github.com/jwiegley/gdtoa)
+    - [sprintf](https://en.cppreference.com/w/c/io/fprintf)
+    - [grisu2](https://github.com/simdjson/simdjson/blob/master/src/to_chars.cpp)
+    - [std::to_chars](https://en.cppreference.com/w/cpp/utility/to_chars)
+    - [Dragonbox](https://github.com/jk-jeon/dragonbox)
+    - [Ryu](https://github.com/ulfjack/ryu)
+    - [double-conversion](https://github.com/google/double-conversion)
+    - [Abseil](https://github.com/abseil/abseil-cpp)
 
 If you have a recent version of CMake (3.15 or better) under linux,  you can simply
 go in the directory and type the following commands:
@@ -12,11 +26,8 @@ cmake --build build
 ./build/benchmarks/benchmark 
 ```
 
-
-
 You may use docker to run these benchmarks easily on a variety of platforms: see https://github.com/lemire/docker_programming_station
 
-
 ## Windows
 
 Usage under Windows is similar. After installing cmake and Visual Studio 2019, one might type in the appropriate shell:
@@ -37,12 +48,12 @@ Serialize the strings (one per line) included in a text file:
 
 Serialize strings generated from floats in (0,1):
 
-
 ```
 ./build/benchmarks/benchmark
 ```
 
-## References
+## Other existing benchmarks
 
 - [dtoa Benchmark](https://github.com/miloyip/dtoa-benchmark)
-- [Benchmark different approaches to parsing scientific datafiles](https://github.com/alugowski/parse-bench)
+- [parse-bench](https://github.com/alugowski/parse-bench)
+- [Drackennest](https://github.com/abolz/Drachennest)