diff --git a/setup.py b/setup.py
index f751107f..69bf39d4 100755
--- a/setup.py
+++ b/setup.py
@@ -293,7 +293,7 @@ def init_env(
         df += ' -Og'
         float_conversion = '-Wfloat-conversion'
     fortify_source = '' if sanitize and is_macos else '-D_FORTIFY_SOURCE=2'
-    optimize = df if debug or sanitize else '-O3'
+    optimize = ''
     sanitize_args = get_sanitize_args(cc, ccver) if sanitize else set()
     cppflags_ = os.environ.get(
         'OVERRIDE_CPPFLAGS', '-D{}DEBUG'.format('' if debug else 'N'),
@@ -308,8 +308,8 @@ def init_env(
     cflags_ = os.environ.get(
         'OVERRIDE_CFLAGS', (
             f'-Wextra {float_conversion} -Wno-missing-field-initializers -Wall -Wstrict-prototypes {std}'
-            f' {werror} {optimize} {sanitize_flag} -fwrapv {stack_protector} {missing_braces}'
-            f' -pipe {march} -fvisibility=hidden {fortify_source}'
+            f' {optimize} {sanitize_flag} -fwrapv {stack_protector} {missing_braces}'
+            f' {march} -fvisibility=hidden {fortify_source}'
         )
     )
     cflags = shlex.split(cflags_) + shlex.split(
@@ -317,7 +317,7 @@ def init_env(
     )
     ldflags_ = os.environ.get(
         'OVERRIDE_LDFLAGS',
-        '-Wall ' + ' '.join(sanitize_args) + ('' if debug else ' -O3')
+        '-Wall ' + ' '.join(sanitize_args)
     )
     ldflags = shlex.split(ldflags_)
     ldflags.append('-shared')
@@ -789,10 +789,7 @@


 def build_launcher(args: Options, launcher_dir: str = '.', bundle_type: str = 'source') -> None:
-    werror = '' if args.ignore_compiler_warnings else '-pedantic-errors -Werror'
-    cflags = f'-Wall {werror} -fpie'.split()
-    if args.build_universal_binary:
-        cflags += '-arch x86_64 -arch arm64'.split()
+    cflags = f'-Wall -fpie'.split()
     cppflags = []
     libs: List[str] = []
     if args.profile or args.sanitize:
@@ -803,8 +801,6 @@ def build_launcher(args: Options, launcher_dir: str = '.', bundle_type: str = 's
             cflags.append('-g')
         if args.profile:
             libs.append('-lprofiler')
-    else:
-        cflags.append('-O3')
     if bundle_type.endswith('-freeze'):
         cppflags.append('-DFOR_BUNDLE')
         cppflags.append('-DPYVER="{}"'.format(sysconfig.get_python_version()))