Added reasoning

diff --git a/contrib/declib/README.md b/contrib/declib/README.md
index 866497c3c4726fb5ee1a032d07aca1a6f189fc90..fbe7ac786d7ba92b6692332c93912b247669350a 100644 (file)
--- a/contrib/declib/README.md
+++ b/contrib/declib/README.md
@@ -7,6 +7,9 @@ Create `zstddeclib.c` from the Zstd source using:
 cd zstd/contrib/declib
 ./combine.sh -r ../../lib -r ../../lib/common -r ../../lib/decompress -o zstddeclib.c zstddeclib-in.c
 ```
-Then add the resulting file to your project (see the [example files](examples)).
+Then add the resulting file to your project (see the [example files](examples)). `build.sh` will run the above script then compile and test the resulting library.
 
-`build.sh` will run the above script then compile and test the resulting library.
+Why
+---
+
+Because all it now takes to support decompressing Zstd is the addition of a single file, two if using the header, with no configuration or further build steps. The library is small, adding, for example, 25kB to an Emscripten compiled WebAssembly project. Native implementations add a little more, 40-70kB depending on the compiler and platform.