diff --git a/.gitignore b/.gitignore
index a285de586d2..d85a95bc985 100644
--- a/.gitignore
+++ b/.gitignore
@@ -39,3 +39,6 @@ chrome_profiler.json
 # e2e test
 playwright-report
 test-results
+
+# dhat
+dhat-*.json
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
index 6186ce14411..5138c658080 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -342,6 +342,7 @@ dependencies = [
  "boa_runtime",
  "clap",
  "colored",
+ "dhat",
  "jemallocator",
  "phf",
  "pollster",
@@ -955,6 +956,22 @@ dependencies = [
  "syn 2.0.37",
 ]
 
+[[package]]
+name = "dhat"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4f2aaf837aaf456f6706cb46386ba8dffd4013a757e36f4ea05c20dd46b209a3"
+dependencies = [
+ "backtrace",
+ "lazy_static",
+ "mintex",
+ "parking_lot 0.12.1",
+ "rustc-hash",
+ "serde",
+ "serde_json",
+ "thousands",
+]
+
 [[package]]
 name = "displaydoc"
 version = "0.2.4"
@@ -1883,6 +1900,16 @@ dependencies = [
  "adler",
 ]
 
+[[package]]
+name = "mintex"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd7c5ba1c3b5a23418d7bbf98c71c3d4946a0125002129231da8d6b723d559cb"
+dependencies = [
+ "once_cell",
+ "sys-info",
+]
+
 [[package]]
 name = "mio"
 version = "0.8.8"
@@ -2838,6 +2865,16 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "sys-info"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b3a0d0aba8bf96a0e1ddfdc352fc53b3df7f39318c71854910c3c4b024ae52c"
+dependencies = [
+ "cc",
+ "libc",
+]
+
 [[package]]
 name = "sys-locale"
 version = "0.3.1"
@@ -2899,6 +2936,12 @@ dependencies = [
  "syn 2.0.37",
 ]
 
+[[package]]
+name = "thousands"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3bf63baf9f5039dadc247375c29eb13706706cfde997d0330d05aa63a77d8820"
+
 [[package]]
 name = "thread_local"
 version = "1.1.7"
diff --git a/Cargo.toml b/Cargo.toml
index 6f7bc27690a..46dca258247 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -100,6 +100,7 @@ incremental = false
 lto = "fat"
 # Makes sure that all code is compiled together, for LTO
 codegen-units = 1
+debug = 1
 
 # The test profile, used for `cargo test`.
 [profile.test]
diff --git a/boa_cli/Cargo.toml b/boa_cli/Cargo.toml
index 6d30aa0164f..33d81dee094 100644
--- a/boa_cli/Cargo.toml
+++ b/boa_cli/Cargo.toml
@@ -25,9 +25,11 @@ colored.workspace = true
 regex.workspace = true
 phf = { workspace = true, features = ["macros"] }
 pollster.workspace = true
+dhat = { version = "0.3.2", optional = true }
 
 [features]
 default = ["boa_engine/annex-b", "boa_engine/experimental", "boa_engine/intl"]
+dhat = ["dep:dhat"]
 
 [target.x86_64-unknown-linux-gnu.dependencies]
 jemallocator.workspace = true
diff --git a/boa_cli/src/main.rs b/boa_cli/src/main.rs
index 8e8f964aa31..3c313e4ffde 100644
--- a/boa_cli/src/main.rs
+++ b/boa_cli/src/main.rs
@@ -88,13 +88,22 @@ use std::{
     println,
 };
 
-#[cfg(all(target_arch = "x86_64", target_os = "linux", target_env = "gnu"))]
+#[cfg(all(
+    target_arch = "x86_64",
+    target_os = "linux",
+    target_env = "gnu",
+    not(feature = "dhat")
+))]
 #[cfg_attr(
     all(target_arch = "x86_64", target_os = "linux", target_env = "gnu"),
     global_allocator
 )]
 static ALLOC: jemallocator::Jemalloc = jemallocator::Jemalloc;
 
+#[cfg(feature = "dhat")]
+#[global_allocator]
+static ALLOC: dhat::Alloc = dhat::Alloc;
+
 /// CLI configuration for Boa.
 static CLI_HISTORY: &str = ".boa_history";
 
@@ -367,6 +376,9 @@ fn evaluate_files(
 }
 
 fn main() -> Result<(), io::Error> {
+    #[cfg(feature = "dhat")]
+    let _profiler = dhat::Profiler::new_heap();
+
     let args = Opt::parse();
 
     let queue: &dyn JobQueue = &Jobs::default();
diff --git a/boa_engine/src/context/intrinsics.rs b/boa_engine/src/context/intrinsics.rs
index 87768a22e9d..2547dea121c 100644
--- a/boa_engine/src/context/intrinsics.rs
+++ b/boa_engine/src/context/intrinsics.rs
@@ -191,7 +191,7 @@ impl Default for StandardConstructors {
             )),
             string: StandardConstructor::with_prototype(JsObject::from_proto_and_data(
                 None,
-                ObjectData::string("".into()),
+                ObjectData::string(js_string!()),
             )),
             regexp: StandardConstructor::default(),
             symbol: StandardConstructor::default(),
diff --git a/boa_engine/src/string/common.rs b/boa_engine/src/string/common.rs
index 1b49483f4c0..8e8b05febee 100644
--- a/boa_engine/src/string/common.rs
+++ b/boa_engine/src/string/common.rs
@@ -193,9 +193,6 @@ thread_local! {
 }
 
 /// Array of raw static strings that aren't reference counted.
-///
-/// The macro `static_strings` automatically sorts the array of strings, making it faster
-/// for searches by using `binary_search`.
 const RAW_STATICS: &[&[u16]] = &[
     utf16!(""),
     // Well known symbols