diff --git a/Cargo.lock b/Cargo.lock
index 2dabeedc4b..438b84f2f2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -732,6 +732,7 @@ dependencies = [
  "miette",
  "num-bigint",
  "num-complex",
+ "once_cell",
  "qsc_eval",
  "qsc_frontend",
  "qsc_passes",
diff --git a/Cargo.toml b/Cargo.toml
index 21332826aa..50a3767045 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,6 +30,7 @@ thiserror = "1.0.39"
 num-bigint = "0.4.3"
 num-complex = "0.4"
 num-traits = "0.2.15"
+once_cell = "1.17.1"
 serde = "1.0"
 serde-wasm-bindgen = "0.5"
 wasm-bindgen = "0.2.84"
diff --git a/compiler/qsc_wasm/Cargo.toml b/compiler/qsc_wasm/Cargo.toml
index d7ed60e5ef..5167dab9cb 100644
--- a/compiler/qsc_wasm/Cargo.toml
+++ b/compiler/qsc_wasm/Cargo.toml
@@ -23,6 +23,7 @@ js-sys = { workspace = true }
 miette = { workspace = true}
 num-bigint = { workspace = true }
 num-complex = { workspace = true }
+once_cell = { workspace = true }
 serde = { workspace = true, features = ["derive"]}
 serde-wasm-bindgen = { workspace = true}
 wasm-bindgen = { workspace = true}
diff --git a/compiler/qsc_wasm/src/lib.rs b/compiler/qsc_wasm/src/lib.rs
index ad41e13dfd..b19a91b146 100644
--- a/compiler/qsc_wasm/src/lib.rs
+++ b/compiler/qsc_wasm/src/lib.rs
@@ -3,9 +3,10 @@
 
 use num_bigint::BigUint;
 use num_complex::Complex64;
+use once_cell::sync::OnceCell;
 use qsc_eval::output::Receiver;
 use qsc_eval::{output, Error, Evaluator};
-use qsc_frontend::compile::{compile, std, PackageStore};
+use qsc_frontend::compile::{compile, std, PackageId, PackageStore};
 use qsc_passes::globals::extract_callables;
 
 use miette::{Diagnostic, Severity};
@@ -226,9 +227,13 @@ where
 }
 
 fn check_code_internal(code: &str) -> Vec<VSDiagnostic> {
-    let mut store = PackageStore::new();
-    let std = store.insert(std());
-    let unit = compile(&store, [std], [code], "");
+    static STDLIB_STORE: OnceCell<(PackageId, PackageStore)> = OnceCell::new();
+    let (std, ref store) = STDLIB_STORE.get_or_init(|| {
+        let mut store = PackageStore::new();
+        let std = store.insert(std());
+        (std, store)
+    });
+    let unit = compile(store, [*std], [code], "");
 
     let mut result: Vec<VSDiagnostic> = vec![];