postgresml · levkk · Sep 21, 2022 · Sep 21, 2022
diff --git a/pgml-extension/pgml_rust/Cargo.toml b/pgml-extension/pgml_rust/Cargo.toml
@@ -31,6 +31,7 @@ rmp-serde = { version = "1.1.0" }
 typetag = "0.2"
 pyo3 = { version = "0.17", features = ["auto-initialize"] }
 heapless = "0.7.13"
+parking_lot = "0.12"
 
 [dev-dependencies]
 pgx-tests = "=0.4.5"

diff --git a/pgml-extension/pgml_rust/src/api.rs b/pgml-extension/pgml_rust/src/api.rs
@@ -1,7 +1,7 @@
+use parking_lot::Mutex;
 use std::collections::HashMap;
 use std::fmt::Write;
 use std::str::FromStr;
-use std::sync::Mutex;
 
 use once_cell::sync::Lazy;
 use pgx::*;
@@ -244,7 +244,7 @@ fn deploy(
 
 #[pg_extern]
 fn predict(project_name: &str, features: Vec<f32>) -> f32 {
-    let mut projects = PROJECT_NAME_TO_PROJECT_ID.lock().unwrap();
+    let mut projects = PROJECT_NAME_TO_PROJECT_ID.lock();
     let project_id = match projects.get(project_name) {
         Some(project_id) => *project_id,
         None => {

diff --git a/pgml-extension/pgml_rust/src/lib.rs b/pgml-extension/pgml_rust/src/lib.rs
@@ -6,7 +6,7 @@ use once_cell::sync::Lazy; // 1.3.1
 use pgx::*;
 use std::collections::HashMap;
 use std::fs;
-use std::sync::Mutex;
+use parking_lot::Mutex;
 use xgboost::{Booster, DMatrix};
 
 pub mod api;
@@ -25,7 +25,7 @@ static MODELS: Lazy<Mutex<HashMap<i64, Vec<u8>>>> = Lazy::new(|| Mutex::new(Hash
 
 #[pg_extern]
 fn model_predict(model_id: i64, features: Vec<f32>) -> f32 {
-    let mut guard = MODELS.lock().unwrap();
+    let mut guard = MODELS.lock();
 
     match guard.get(&model_id) {
         Some(data) => {
@@ -59,7 +59,7 @@ fn model_predict(model_id: i64, features: Vec<f32>) -> f32 {
 
 #[pg_extern]
 fn model_predict_batch(model_id: i64, features: Vec<f32>, num_rows: i32) -> Vec<f32> {
-    let mut guard = MODELS.lock().unwrap();
+    let mut guard = MODELS.lock();
 
     if num_rows < 0 {
         error!("Number of rows has to be greater than 0");

diff --git a/pgml-extension/pgml_rust/src/orm/estimator.rs b/pgml-extension/pgml_rust/src/orm/estimator.rs
@@ -2,7 +2,7 @@ use std::collections::HashMap;
 use std::fmt::Debug;
 use std::str::FromStr;
 use std::sync::Arc;
-use std::sync::Mutex;
+use parking_lot::Mutex;
 
 use ndarray::{Array1, Array2};
 use once_cell::sync::Lazy;
@@ -26,7 +26,7 @@ static DEPLOYED_ESTIMATORS_BY_MODEL_ID: Lazy<Mutex<HashMap<i64, Arc<Box<dyn Esti
 pub fn find_deployed_estimator_by_model_id(model_id: i64) -> Arc<Box<dyn Estimator>> {
     // Get the estimator from process memory, if we already loaded it.
     {
-        let estimators = DEPLOYED_ESTIMATORS_BY_MODEL_ID.lock().unwrap();
+        let estimators = DEPLOYED_ESTIMATORS_BY_MODEL_ID.lock();
         if let Some(estimator) = estimators.get(&model_id) {
             return estimator.clone();
         }
@@ -88,7 +88,7 @@ pub fn find_deployed_estimator_by_model_id(model_id: i64) -> Arc<Box<dyn Estimat
     };
 
     // Cache the estimator in process memory.
-    let mut estimators = DEPLOYED_ESTIMATORS_BY_MODEL_ID.lock().unwrap();
+    let mut estimators = DEPLOYED_ESTIMATORS_BY_MODEL_ID.lock();
     estimators.insert(model_id, Arc::new(estimator));
     estimators.get(&model_id).unwrap().clone()
 }