diff --git a/compiler/bin-wasm_of_ocaml/compile.ml b/compiler/bin-wasm_of_ocaml/compile.ml
index 1e31b66af..386bebcf0 100644
--- a/compiler/bin-wasm_of_ocaml/compile.ml
+++ b/compiler/bin-wasm_of_ocaml/compile.ml
@@ -69,26 +69,29 @@ let output_gen output_file f =
   Code.Var.set_stable (Config.Flag.stable_var ());
   Filename.gen_file output_file f
 
-let common_binaryen_options =
-  [ "--enable-gc"
-  ; "--enable-multivalue"
-  ; "--enable-exception-handling"
-  ; "--enable-reference-types"
-  ; "--enable-tail-call"
-  ; "--enable-bulk-memory"
-  ; "--enable-nontrapping-float-to-int"
-  ; "--enable-strings"
-  ; "-g"
-  ]
+let common_binaryen_options () =
+  let l =
+    [ "--enable-gc"
+    ; "--enable-multivalue"
+    ; "--enable-exception-handling"
+    ; "--enable-reference-types"
+    ; "--enable-tail-call"
+    ; "--enable-bulk-memory"
+    ; "--enable-nontrapping-float-to-int"
+    ; "--enable-strings"
+    ]
+  in
+  if Config.Flag.pretty () then "-g" :: l else l
 
 let link runtime_files input_file output_file =
   command
-    (("wasm-merge" :: common_binaryen_options)
-    @ List.flatten
-        (List.map
-           ~f:(fun runtime_file -> [ Filename.quote runtime_file; "env" ])
-           runtime_files)
-    @ [ Filename.quote input_file; "exec"; "-o"; Filename.quote output_file ])
+    ("wasm-merge"
+    :: (common_binaryen_options ()
+       @ List.flatten
+           (List.map
+              ~f:(fun runtime_file -> [ Filename.quote runtime_file; "env" ])
+              runtime_files)
+       @ [ Filename.quote input_file; "exec"; "-o"; Filename.quote output_file ]))
 
 let generate_dependencies primitives =
   Yojson.Basic.to_string
@@ -124,28 +127,37 @@ let dead_code_elimination in_file out_file =
   let primitives = Linker.get_provided () in
   write_file deps_file (generate_dependencies primitives);
   command
-    (("wasm-metadce" :: common_binaryen_options)
-    @ [ "--graph-file"
-      ; Filename.quote deps_file
-      ; Filename.quote in_file
-      ; "-o"
-      ; Filename.quote out_file
-      ; ">"
-      ; Filename.quote usage_file
-      ]);
+    ("wasm-metadce"
+    :: (common_binaryen_options ()
+       @ [ "--graph-file"
+         ; Filename.quote deps_file
+         ; Filename.quote in_file
+         ; "-o"
+         ; Filename.quote out_file
+         ; ">"
+         ; Filename.quote usage_file
+         ]));
   filter_unused_primitives primitives usage_file
 
-let optimize in_file out_file =
+let optimization_options =
+  [| [ "-O2"; "--skip-pass=inlining-optimizing" ]
+   ; [ "-O2"; "--skip-pass=inlining-optimizing"; "--traps-never-happen" ]
+   ; [ "-O3"; "--traps-never-happen" ]
+  |]
+
+let optimize ~profile in_file out_file =
+  let level =
+    match profile with
+    | None -> 1
+    | Some p -> fst (List.find ~f:(fun (_, p') -> Poly.equal p p') Driver.profiles)
+  in
   command
-    (("wasm-opt" :: common_binaryen_options)
-    @ [ "-O2"
-      ; "--skip-pass=inlining-optimizing"
-      ; Filename.quote in_file
-      ; "-o"
-      ; Filename.quote out_file
-      ])
+    ("wasm-opt"
+    :: (common_binaryen_options ()
+       @ optimization_options.(level - 1)
+       @ [ Filename.quote in_file; "-o"; Filename.quote out_file ]))
 
-let link_and_optimize runtime_wasm_files wat_file output_file =
+let link_and_optimize ~profile runtime_wasm_files wat_file output_file =
   with_intermediate_file (Filename.temp_file "runtime" ".wasm")
   @@ fun runtime_file ->
   write_file runtime_file Wa_runtime.wasm_runtime;
@@ -155,7 +167,7 @@ let link_and_optimize runtime_wasm_files wat_file output_file =
   with_intermediate_file (Filename.temp_file "wasm-dce" ".wasm")
   @@ fun temp_file' ->
   let primitives = dead_code_elimination temp_file temp_file' in
-  optimize temp_file' output_file;
+  optimize ~profile temp_file' output_file;
   primitives
 
 let escape_string s =
@@ -351,7 +363,9 @@ let run { Cmd_arg.common; profile; runtime_files; input_file; output_file; param
        gen_file wasm_file
        @@ fun tmp_wasm_file ->
        let strings = output_gen wat_file (output code ~standalone:true) in
-       let primitives = link_and_optimize runtime_wasm_files wat_file tmp_wasm_file in
+       let primitives =
+         link_and_optimize ~profile runtime_wasm_files wat_file tmp_wasm_file
+       in
        build_js_runtime primitives strings wasm_file output_file
    | `Cmo _ | `Cma _ -> assert false);
    close_ic ());