make debug build of fullstack applications load faster by default

packages/cli/src/server/fullstack/mod.rs

@@ -55,6 +55,7 @@ impl Platform for FullstackPlatform {
                 }
                 None => desktop_config.features = Some(vec![desktop_feature]),
             };
+            let _gaurd = FullstackServerEnvGuard::new(self.serve.debug);
             self.desktop.rebuild(&desktop_config)
         }
     }
@@ -71,5 +72,64 @@ fn build_web(serve: ConfigOptsServe) -> Result<()> {
         None => web_config.features = Some(vec![web_feature]),
     };
     web_config.platform = Some(crate::cfg::Platform::Web);
+
+    let _gaurd = FullstackWebEnvGuard::new(web_config.debug);
     crate::cli::build::Build { build: web_config }.build(None)
 }
+
+// Debug mode web builds have a very large size by default. If debug mode is not enabled, we strip some of the debug info by default
+// This reduces a hello world from ~40MB to ~2MB
+pub(crate) struct FullstackWebEnvGuard {
+    old_rustflags: Option<String>,
+}
+
+impl FullstackWebEnvGuard {
+    pub fn new(debug_mode: bool) -> Self {
+        Self {
+            old_rustflags: (!debug_mode).then(|| {
+                let old_rustflags = std::env::var("RUSTFLAGS").unwrap_or_default();
+
+                std::env::set_var(
+                    "RUSTFLAGS",
+                    format!("{old_rustflags} -C debuginfo=none -C strip=debuginfo"),
+                );
+                old_rustflags
+            }),
+        }
+    }
+}
+
+impl Drop for FullstackWebEnvGuard {
+    fn drop(&mut self) {
+        if let Some(old_rustflags) = self.old_rustflags.take() {
+            std::env::set_var("RUSTFLAGS", old_rustflags);
+        }
+    }
+}
+
+// Debug mode web builds have a very large size by default. If debug mode is not enabled, we strip some of the debug info by default
+// This reduces a hello world from ~40MB to ~2MB
+pub(crate) struct FullstackServerEnvGuard {
+    old_rustflags: Option<String>,
+}
+
+impl FullstackServerEnvGuard {
+    pub fn new(debug_mode: bool) -> Self {
+        Self {
+            old_rustflags: (!debug_mode).then(|| {
+                let old_rustflags = std::env::var("RUSTFLAGS").unwrap_or_default();
+
+                std::env::set_var("RUSTFLAGS", format!("{old_rustflags} -C opt-level=2"));
+                old_rustflags
+            }),
+        }
+    }
+}
+
+impl Drop for FullstackServerEnvGuard {
+    fn drop(&mut self) {
+        if let Some(old_rustflags) = self.old_rustflags.take() {
+            std::env::set_var("RUSTFLAGS", old_rustflags);
+        }
+    }
+}