diff --git a/Cargo.lock b/Cargo.lock
index a20af45..ce96b94 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -343,6 +343,7 @@ dependencies = [
  "datafusion",
  "datafusion-common",
  "datafusion-expr",
+ "mimalloc",
  "pyo3",
  "rand 0.7.3",
  "tokio",
@@ -713,6 +714,15 @@ version = "0.2.112"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1b03d17f364a3a042d5e5d46b053bbbf82c92c9430c592dd4c064dc6ee997125"
 
+[[package]]
+name = "libmimalloc-sys"
+version = "0.1.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7705fc40f6ed493f73584abbb324e74f96b358ff60dfe5659a0f8fc12c590a69"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "lock_api"
 version = "0.4.6"
@@ -766,6 +776,15 @@ version = "2.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "308cc39be01b73d0d18f82a0e7b2a3df85245f84af96fdddc5d202d27e47b86a"
 
+[[package]]
+name = "mimalloc"
+version = "0.1.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0dfa131390c2f6bdb3242f65ff271fcdaca5ff7b6c08f28398be7f2280e3926"
+dependencies = [
+ "libmimalloc-sys",
+]
+
 [[package]]
 name = "miniz_oxide"
 version = "0.4.4"
diff --git a/Cargo.toml b/Cargo.toml
index bfff3ab..82e9141 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -35,6 +35,7 @@ datafusion = { version = "^7.0.0", features = ["pyarrow"] }
 datafusion-expr = { version = "^7.0.0" }
 datafusion-common = { version = "^7.0.0", features = ["pyarrow"] }
 uuid = { version = "0.8", features = ["v4"] }
+mimalloc = { version = "*", default-features = false }
 
 [lib]
 name = "_internal"
diff --git a/src/lib.rs b/src/lib.rs
index d40bae2..ab528a1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -15,6 +15,7 @@
 // specific language governing permissions and limitations
 // under the License.
 
+use mimalloc::MiMalloc;
 use pyo3::prelude::*;
 
 mod catalog;
@@ -27,6 +28,9 @@ mod udaf;
 mod udf;
 mod utils;
 
+#[global_allocator]
+static GLOBAL: MiMalloc = MiMalloc;
+
 /// Low-level DataFusion internal package.
 ///
 /// The higher-level public API is defined in pure python files under the