diff --git a/Cargo.toml b/Cargo.toml
index 91a7f94c..9a646b43 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,9 @@ bench = false
 name = "tket2"
 path = "src/lib.rs"
 
+[profile.release]
+lto = "thin"
+
 [dependencies]
 lazy_static = "1.4.0"
 cgmath = "0.18.0"
diff --git a/taso-optimiser/Cargo.toml b/taso-optimiser/Cargo.toml
index d3106737..5d82ccb7 100644
--- a/taso-optimiser/Cargo.toml
+++ b/taso-optimiser/Cargo.toml
@@ -17,6 +17,9 @@ tracing-subscriber = "0.3.17"
 tracing-appender = "0.2.2"
 peak_alloc = { version = "0.2.0", optional = true }
 
+[target.'cfg(not(target_env = "msvc"))'.dependencies]
+tikv-jemallocator = "0.5"
+
 [features]
-default = ["peak_alloc"]
+default = []
 peak_alloc = ["dep:peak_alloc"]
diff --git a/taso-optimiser/src/main.rs b/taso-optimiser/src/main.rs
index 9ca1242a..be58c97a 100644
--- a/taso-optimiser/src/main.rs
+++ b/taso-optimiser/src/main.rs
@@ -15,11 +15,12 @@ use tket2::optimiser::taso::log::TasoLogger;
 use tket2::optimiser::TasoOptimiser;
 
 #[cfg(feature = "peak_alloc")]
-use peak_alloc::PeakAlloc;
+#[global_allocator]
+static PEAK_ALLOC: peak_alloc::PeakAlloc = peak_alloc::PeakAlloc;
 
-#[cfg(feature = "peak_alloc")]
+#[cfg(all(not(target_env = "msvc"), not(feature = "peak_alloc")))]
 #[global_allocator]
-static PEAK_ALLOC: PeakAlloc = PeakAlloc;
+static GLOBAL: tikv_jemallocator::Jemalloc = tikv_jemallocator::Jemalloc;
 
 /// Optimise circuits using Quartz-generated ECCs.
 ///