From e540fc19f5c592236368fb19cf84a9ed54ae7540 Mon Sep 17 00:00:00 2001
From: Michael Aaron Murphy <michael@mmurphy.dev>
Date: Tue, 4 Feb 2025 16:25:57 +0100
Subject: [PATCH] fix: set M_MALLOC_THRESHOLD to prevent memory fragmentation

---
 Cargo.lock                 | 1 +
 cosmic-applets/Cargo.toml  | 1 +
 cosmic-applets/src/main.rs | 9 ++++++++-
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/Cargo.lock b/Cargo.lock
index dbac25a3..0bedd9d1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1353,6 +1353,7 @@ dependencies = [
  "cosmic-applet-time",
  "cosmic-applet-workspaces",
  "cosmic-panel-button",
+ "libc",
  "libcosmic",
  "tracing",
  "tracing-log",
diff --git a/cosmic-applets/Cargo.toml b/cosmic-applets/Cargo.toml
index 24d5931a..72dc0264 100644
--- a/cosmic-applets/Cargo.toml
+++ b/cosmic-applets/Cargo.toml
@@ -20,6 +20,7 @@ cosmic-applet-time = { path = "../cosmic-applet-time" }
 cosmic-applet-workspaces = { path = "../cosmic-applet-workspaces" }
 cosmic-applet-input-sources = { path = "../cosmic-applet-input-sources" }
 cosmic-panel-button = { path = "../cosmic-panel-button" }
+libc = "0.2"
 libcosmic.workspace = true
 tracing.workspace = true
 tracing-subscriber.workspace = true
diff --git a/cosmic-applets/src/main.rs b/cosmic-applets/src/main.rs
index 93b3ec76..a4ed92ca 100644
--- a/cosmic-applets/src/main.rs
+++ b/cosmic-applets/src/main.rs
@@ -4,6 +4,13 @@
 const VERSION: &str = env!("CARGO_PKG_VERSION");
 
 fn main() -> cosmic::iced::Result {
+    // Prevents glibc from hoarding memory, such as cosmic-applet-minimize
+    // consuming 100s of megabytes on restoring a minimized window.
+    #[cfg(target_env = "gnu")]
+    unsafe {
+        libc::mallopt(libc::M_MMAP_THRESHOLD, 65536);
+    }
+
     tracing_subscriber::fmt().with_env_filter("warn").init();
     let _ = tracing_log::LogTracer::init();
 
@@ -32,6 +39,6 @@ fn main() -> cosmic::iced::Result {
         "cosmic-applet-workspaces" => cosmic_applet_workspaces::run(),
         "cosmic-applet-input-sources" => cosmic_applet_input_sources::run(),
         "cosmic-panel-button" => cosmic_panel_button::run(),
-        _ => return Ok(()),
+        _ => Ok(()),
     }
 }