wasm-opt: add page (#2383)

pages/common/wasm-opt.md

@@ -0,0 +1,19 @@
+# wasm-opt
+
+> Optimize WebAssembly binary files.
+
+- Apply default optimizations and write to a given file:
+
+`wasm-opt -O {{input.wasm}} -o {{output.wasm}}`
+
+- Apply all optimizations and write to a given file (takes more time, but generates optimal code):
+
+`wasm-opt -O4 {{input.wasm}} -o {{output.wasm}}`
+
+- Optimize a file for size:
+
+`wasm-opt -Oz {{input.wasm}} -o {{output.wasm}}`
+
+- Print the textual representation of the binary to console:
+
+`wasm-opt {{input.wasm}} --print`