diff --git a/build_config.rb b/build_config.rb
index 1f8778f..91b0225 100644
--- a/build_config.rb
+++ b/build_config.rb
@@ -12,11 +12,14 @@ def debug_config(conf)
   conf.enable_debug
 end
 
-def build_config(conf, target = nil, strip: false)
+def build_config(conf, target = nil, optimize: false)
   [conf.cc, conf.linker].each do |cc|
     cc.command = 'zig cc'
     cc.flags += ['-target', target] if target
-    cc.flags << '-s' if strip
+    if optimize
+      cc.flags += %w[-s -O3]
+      cc.flags += %w[-mtune=native -march=native] if target == 'x86_64-linux-musl'
+    end
   end
 
   conf.archiver.command = 'zig ar'
@@ -25,7 +28,7 @@ def build_config(conf, target = nil, strip: false)
 end
 
 MRuby::Build.new do |conf|
-  build_config(conf)
+  build_config(conf, optimize: true)
   debug_config(conf)
   gem_config(conf)
 end
@@ -39,7 +42,7 @@ def build_config(conf, target = nil, strip: false)
   next unless build_targets.include?(arch)
 
   MRuby::CrossBuild.new(arch) do |conf|
-    build_config(conf, target, strip: true)
+    build_config(conf, target, optimize: true)
     debug_config(conf)
     gem_config(conf)
   end
@@ -49,7 +52,7 @@ def build_config(conf, target = nil, strip: false)
   MRuby::CrossBuild.new('darwin-amd64') do |conf|
     macos_sdk = ENV.fetch('MACOSX_SDK_PATH').shellescape
 
-    build_config(conf, 'x86_64-macos', strip: true)
+    build_config(conf, 'x86_64-macos', optimize: true)
     conf.cc.flags += ['-Wno-overriding-t-option', '-mmacosx-version-min=10.14',
                       '-isysroot', macos_sdk, '-iwithsysroot', '/usr/include',
                       '-iframeworkwithsysroot', '/System/Library/Frameworks']
@@ -68,7 +71,7 @@ def build_config(conf, target = nil, strip: false)
   MRuby::CrossBuild.new('darwin-arm64') do |conf|
     macos_sdk = ENV.fetch('MACOSX_SDK_PATH').shellescape
 
-    build_config(conf, 'aarch64-macos', strip: true)
+    build_config(conf, 'aarch64-macos', optimize: true)
     conf.cc.flags += ['-Wno-overriding-t-option', '-mmacosx-version-min=11.1',
                       '-isysroot', macos_sdk, '-iwithsysroot', '/usr/include',
                       '-iframeworkwithsysroot', '/System/Library/Frameworks']
@@ -93,7 +96,7 @@ def build_config(conf, target = nil, strip: false)
 
     [conf.cc, conf.linker].each do |cc|
       cc.command = "#{conf.host_target}-gcc-posix"
-      cc.flags << '-static'
+      cc.flags += %w[-static -O3]
     end
     conf.cc.defines      += %w[MRB_STR_LENGTH_MAX=0 MRB_UTF8_STRING MRUBY_YAML_NO_CANONICAL_NULL]
     conf.cxx.command      = "#{conf.host_target}-g++"
diff --git a/build_config.rb.lock b/build_config.rb.lock
index 68573ca..e13dcd6 100644
--- a/build_config.rb.lock
+++ b/build_config.rb.lock
@@ -85,6 +85,11 @@ builds:
       branch: master
       commit: bb773da39517f3ae7232538c7e9c476d45f3d9b7
       version: 0.0.0
+    https://github.com/mrbgems/mruby-tempfile.git:
+      url: https://github.com/mrbgems/mruby-tempfile.git
+      branch: master
+      commit: 48073012c932f540dc3773b2dc6b079caf71a70d
+      version: 0.0.0
   linux-arm64:
     https://github.com/mattn/mruby-json.git:
       url: https://github.com/mattn/mruby-json.git
@@ -121,6 +126,11 @@ builds:
       branch: master
       commit: bb773da39517f3ae7232538c7e9c476d45f3d9b7
       version: 0.0.0
+    https://github.com/mrbgems/mruby-tempfile.git:
+      url: https://github.com/mrbgems/mruby-tempfile.git
+      branch: master
+      commit: 48073012c932f540dc3773b2dc6b079caf71a70d
+      version: 0.0.0
   darwin-amd64:
     https://github.com/mattn/mruby-json.git:
       url: https://github.com/mattn/mruby-json.git
@@ -157,6 +167,11 @@ builds:
       branch: master
       commit: bb773da39517f3ae7232538c7e9c476d45f3d9b7
       version: 0.0.0
+    https://github.com/mrbgems/mruby-tempfile.git:
+      url: https://github.com/mrbgems/mruby-tempfile.git
+      branch: master
+      commit: 48073012c932f540dc3773b2dc6b079caf71a70d
+      version: 0.0.0
   darwin-arm64:
     https://github.com/mattn/mruby-json.git:
       url: https://github.com/mattn/mruby-json.git
@@ -193,6 +208,11 @@ builds:
       branch: master
       commit: bb773da39517f3ae7232538c7e9c476d45f3d9b7
       version: 0.0.0
+    https://github.com/mrbgems/mruby-tempfile.git:
+      url: https://github.com/mrbgems/mruby-tempfile.git
+      branch: master
+      commit: 48073012c932f540dc3773b2dc6b079caf71a70d
+      version: 0.0.0
   windows-amd64:
     https://github.com/mattn/mruby-json.git:
       url: https://github.com/mattn/mruby-json.git