diff --git a/src/bun.js/api/BunObject.zig b/src/bun.js/api/BunObject.zig
index 84d6f8208eebc..e9397f692bbfe 100644
--- a/src/bun.js/api/BunObject.zig
+++ b/src/bun.js/api/BunObject.zig
@@ -590,7 +590,7 @@ pub fn inspect(
 
     // we are going to always clone to keep things simple for now
     // the common case here will be stack-allocated, so it should be fine
-    var out = ZigString.init(array.toOwnedSliceLeaky()).withEncoding();
+    var out = ZigString.init(array.slice()).withEncoding();
     const ret = out.toJS(globalThis);
     array.deinit();
     return ret;
@@ -3932,7 +3932,7 @@ const TOMLObject = struct {
             return .zero;
         };
 
-        const slice = writer.ctx.buffer.toOwnedSliceLeaky();
+        const slice = writer.ctx.buffer.slice();
         var out = bun.String.fromUTF8(slice);
         defer out.deref();
 
diff --git a/src/bun.js/api/JSBundler.zig b/src/bun.js/api/JSBundler.zig
index bab8fc1a0862b..5e52a877e3060 100644
--- a/src/bun.js/api/JSBundler.zig
+++ b/src/bun.js/api/JSBundler.zig
@@ -557,6 +557,8 @@ pub const JSBundler = struct {
             self.public_path.deinit();
             self.conditions.deinit();
             self.drop.deinit();
+            self.banner.deinit();
+            self.footer.deinit();
         }
     };
 
diff --git a/src/bun.js/api/html_rewriter.zig b/src/bun.js/api/html_rewriter.zig
index ef86b5083f355..767662975c9a2 100644
--- a/src/bun.js/api/html_rewriter.zig
+++ b/src/bun.js/api/html_rewriter.zig
@@ -710,7 +710,7 @@ pub const HTMLRewriter = struct {
 
     //     pub fn done(this: *StreamOutputSink) void {
     //         var prev_value = this.response.body.value;
-    //         var bytes = this.bytes.toOwnedSliceLeaky();
+    //         var bytes = this.bytes.slice();
     //         this.response.body.value = .{
     //             .Blob = JSC.WebCore.Blob.init(bytes, this.bytes.allocator, this.global),
     //         };
diff --git a/src/bun.js/bindings/bindings.zig b/src/bun.js/bindings/bindings.zig
index 75b755bce1495..2fc5a560b0f3a 100644
--- a/src/bun.js/bindings/bindings.zig
+++ b/src/bun.js/bindings/bindings.zig
@@ -3129,7 +3129,7 @@ pub const JSGlobalObject = opaque {
                 return ZigString.static(fmt).toErrorInstance(this);
 
             // Ensure we clone it.
-            var str = ZigString.initUTF8(buf.toOwnedSliceLeaky());
+            var str = ZigString.initUTF8(buf.slice());
 
             return str.toErrorInstance(this);
         } else {
@@ -3148,7 +3148,7 @@ pub const JSGlobalObject = opaque {
             defer buf.deinit();
             var writer = buf.writer();
             writer.print(fmt, args) catch return ZigString.static(fmt).toErrorInstance(this);
-            var str = ZigString.fromUTF8(buf.toOwnedSliceLeaky());
+            var str = ZigString.fromUTF8(buf.slice());
             return str.toTypeErrorInstance(this);
         } else {
             return ZigString.static(fmt).toTypeErrorInstance(this);
@@ -3162,7 +3162,7 @@ pub const JSGlobalObject = opaque {
             defer buf.deinit();
             var writer = buf.writer();
             writer.print(fmt, args) catch return ZigString.static(fmt).toErrorInstance(this);
-            var str = ZigString.fromUTF8(buf.toOwnedSliceLeaky());
+            var str = ZigString.fromUTF8(buf.slice());
             return str.toSyntaxErrorInstance(this);
         } else {
             return ZigString.static(fmt).toSyntaxErrorInstance(this);
@@ -3176,7 +3176,7 @@ pub const JSGlobalObject = opaque {
             defer buf.deinit();
             var writer = buf.writer();
             writer.print(fmt, args) catch return ZigString.static(fmt).toErrorInstance(this);
-            var str = ZigString.fromUTF8(buf.toOwnedSliceLeaky());
+            var str = ZigString.fromUTF8(buf.slice());
             return str.toRangeErrorInstance(this);
         } else {
             return ZigString.static(fmt).toRangeErrorInstance(this);
@@ -4619,7 +4619,7 @@ pub const JSValue = enum(JSValueReprInt) {
 
         var writer = buf.writer();
         try writer.print(fmt, args);
-        return String.init(buf.toOwnedSliceLeaky()).toJS(globalThis);
+        return String.init(buf.slice()).toJS(globalThis);
     }
 
     /// Create a JSValue string from a zig format-print (fmt + args), with pretty format
@@ -4633,7 +4633,7 @@ pub const JSValue = enum(JSValueReprInt) {
         switch (Output.enable_ansi_colors) {
             inline else => |enabled| try writer.print(Output.prettyFmt(fmt, enabled), args),
         }
-        return String.init(buf.toOwnedSliceLeaky()).toJS(globalThis);
+        return String.init(buf.slice()).toJS(globalThis);
     }
 
     pub fn fromEntries(globalThis: *JSGlobalObject, keys_array: [*c]ZigString, values_array: [*c]ZigString, strings_count: usize, clone: bool) JSValue {
diff --git a/src/bun.js/module_loader.zig b/src/bun.js/module_loader.zig
index f597d2dbd7c30..edab5fba41ea3 100644
--- a/src/bun.js/module_loader.zig
+++ b/src/bun.js/module_loader.zig
@@ -2143,7 +2143,7 @@ pub const ModuleLoader = struct {
                     writer.writeAll(";\n") catch bun.outOfMemory();
                 }
 
-                const public_url = bun.String.createUTF8(buf.toOwnedSliceLeaky());
+                const public_url = bun.String.createUTF8(buf.slice());
                 return ResolvedSource{
                     .allocator = &jsc_vm.allocator,
                     .source_code = public_url,
diff --git a/src/bun.js/test/diff_format.zig b/src/bun.js/test/diff_format.zig
index c907d16fd420f..fc04a74e33f57 100644
--- a/src/bun.js/test/diff_format.zig
+++ b/src/bun.js/test/diff_format.zig
@@ -129,8 +129,8 @@ pub const DiffFormatter = struct {
             buffered_writer.flush() catch unreachable;
         }
 
-        const received_slice = received_buf.toOwnedSliceLeaky();
-        const expected_slice = expected_buf.toOwnedSliceLeaky();
+        const received_slice = received_buf.slice();
+        const expected_slice = expected_buf.slice();
 
         if (this.not) {
             const not_fmt = "Expected: not <green>{s}<r>";
diff --git a/src/bun.js/test/expect.zig b/src/bun.js/test/expect.zig
index b522dc8cfbad0..35a417ad4fb03 100644
--- a/src/bun.js/test/expect.zig
+++ b/src/bun.js/test/expect.zig
@@ -2757,7 +2757,7 @@ pub const Expect = struct {
             };
             defer pretty_value.deinit();
 
-            if (strings.eqlLong(pretty_value.toOwnedSliceLeaky(), saved_value, true)) {
+            if (strings.eqlLong(pretty_value.slice(), saved_value, true)) {
                 Jest.runner.?.snapshots.passed += 1;
                 return .undefined;
             }
@@ -2766,7 +2766,7 @@ pub const Expect = struct {
             const signature = comptime getSignature("toMatchSnapshot", "<green>expected<r>", false);
             const fmt = signature ++ "\n\n{any}\n";
             const diff_format = DiffFormatter{
-                .received_string = pretty_value.toOwnedSliceLeaky(),
+                .received_string = pretty_value.slice(),
                 .expected_string = saved_value,
                 .globalThis = globalThis,
             };
@@ -5443,7 +5443,7 @@ pub const ExpectCustomAsymmetricMatcher = struct {
             return .zero;
         };
         if (printed) {
-            return bun.String.init(mutable_string.toOwnedSliceLeaky()).toJS();
+            return bun.String.init(mutable_string.slice()).toJS();
         }
         return ExpectMatcherUtils.printValue(globalThis, this, null);
     }
diff --git a/src/bun.js/test/jest.zig b/src/bun.js/test/jest.zig
index a7d370f35eb0b..ace7a2172a526 100644
--- a/src/bun.js/test/jest.zig
+++ b/src/bun.js/test/jest.zig
@@ -1788,7 +1788,7 @@ inline fn createScope(
                 buffer.reset();
                 appendParentLabel(&buffer, parent) catch @panic("Bun ran out of memory while filtering tests");
                 buffer.append(label) catch unreachable;
-                const str = bun.String.fromBytes(buffer.toOwnedSliceLeaky());
+                const str = bun.String.fromBytes(buffer.slice());
                 is_skip = !regex.matches(str);
                 if (is_skip) {
                     tag_to_use = .skip;
@@ -2087,7 +2087,7 @@ fn eachBind(
                 buffer.reset();
                 appendParentLabel(&buffer, parent) catch @panic("Bun ran out of memory while filtering tests");
                 buffer.append(formattedLabel) catch unreachable;
-                const str = bun.String.fromBytes(buffer.toOwnedSliceLeaky());
+                const str = bun.String.fromBytes(buffer.slice());
                 is_skip = !regex.matches(str);
             }
 
diff --git a/src/bun.js/web_worker.zig b/src/bun.js/web_worker.zig
index 7f64f84842acf..848b84dfde7e5 100644
--- a/src/bun.js/web_worker.zig
+++ b/src/bun.js/web_worker.zig
@@ -331,7 +331,7 @@ pub const WebWorker = struct {
             bun.outOfMemory();
         };
         JSC.markBinding(@src());
-        WebWorker__dispatchError(globalObject, worker.cpp_worker, bun.String.createUTF8(array.toOwnedSliceLeaky()), error_instance);
+        WebWorker__dispatchError(globalObject, worker.cpp_worker, bun.String.createUTF8(array.slice()), error_instance);
         if (vm.worker) |worker_| {
             _ = worker.setRequestedTerminate();
             worker.parent_poll_ref.unrefConcurrently(worker.parent);
diff --git a/src/bundler/bundle_v2.zig b/src/bundler/bundle_v2.zig
index 77efafd485dea..450086c12c717 100644
--- a/src/bundler/bundle_v2.zig
+++ b/src/bundler/bundle_v2.zig
@@ -1439,7 +1439,7 @@ pub const BundleV2 = struct {
                     .entry_points = config.entry_points.keys(),
                     .target = config.target.toAPI(),
                     .absolute_working_dir = if (config.dir.list.items.len > 0)
-                        config.dir.toOwnedSliceLeaky()
+                        config.dir.slice()
                     else
                         null,
                     .inject = &.{},
@@ -1467,8 +1467,8 @@ pub const BundleV2 = struct {
             bundler.options.output_format = config.format;
             bundler.options.bytecode = config.bytecode;
 
-            bundler.options.output_dir = config.outdir.toOwnedSliceLeaky();
-            bundler.options.root_dir = config.rootdir.toOwnedSliceLeaky();
+            bundler.options.output_dir = config.outdir.slice();
+            bundler.options.root_dir = config.rootdir.slice();
             bundler.options.minify_syntax = config.minify.syntax;
             bundler.options.minify_whitespace = config.minify.whitespace;
             bundler.options.minify_identifiers = config.minify.identifiers;
@@ -1479,8 +1479,8 @@ pub const BundleV2 = struct {
             bundler.options.emit_dce_annotations = config.emit_dce_annotations orelse !config.minify.whitespace;
             bundler.options.ignore_dce_annotations = config.ignore_dce_annotations;
             bundler.options.experimental_css = config.experimental_css;
-            bundler.options.banner = config.banner.toOwnedSliceLeaky();
-            bundler.options.footer = config.footer.toOwnedSliceLeaky();
+            bundler.options.banner = config.banner.slice();
+            bundler.options.footer = config.footer.slice();
 
             bundler.configureLinker();
             try bundler.configureDefines();
@@ -1546,7 +1546,7 @@ pub const BundleV2 = struct {
                                     bun.default_allocator.dupe(
                                         u8,
                                         bun.path.joinAbsString(
-                                            this.config.outdir.toOwnedSliceLeaky(),
+                                            this.config.outdir.slice(),
                                             &[_]string{output_file.dest_path},
                                             .auto,
                                         ),
@@ -1556,7 +1556,7 @@ pub const BundleV2 = struct {
                                         u8,
                                         bun.path.joinAbsString(
                                             Fs.FileSystem.instance.top_level_dir,
-                                            &[_]string{ this.config.dir.toOwnedSliceLeaky(), this.config.outdir.toOwnedSliceLeaky(), output_file.dest_path },
+                                            &[_]string{ this.config.dir.slice(), this.config.outdir.slice(), output_file.dest_path },
                                             .auto,
                                         ),
                                     ) catch unreachable
@@ -8951,7 +8951,7 @@ pub const LinkerContext = struct {
                     const input = c.parse_graph.input_files.items(.source)[chunk.entry_point.source_index].path;
                     var buf = MutableString.initEmpty(worker.allocator);
                     js_printer.quoteForJSONBuffer(input.pretty, &buf, true) catch bun.outOfMemory();
-                    const str = buf.toOwnedSliceLeaky(); // worker.allocator is an arena
+                    const str = buf.slice(); // worker.allocator is an arena
                     j.pushStatic(str);
                     line_offset.advance(str);
                 }
diff --git a/src/cli/upgrade_command.zig b/src/cli/upgrade_command.zig
index c75452a0fdfd4..65c4a4c744a4c 100644
--- a/src/cli/upgrade_command.zig
+++ b/src/cli/upgrade_command.zig
@@ -559,7 +559,7 @@ pub const UpgradeCommand = struct {
                 else => return error.HTTPError,
             }
 
-            const bytes = zip_file_buffer.toOwnedSliceLeaky();
+            const bytes = zip_file_buffer.slice();
 
             progress.end();
             refresher.refresh();
diff --git a/src/js_printer.zig b/src/js_printer.zig
index 08199425c23ff..25100aa707914 100644
--- a/src/js_printer.zig
+++ b/src/js_printer.zig
@@ -5804,7 +5804,7 @@ const FileWriterInternal = struct {
         ctx: *FileWriterInternal,
     ) anyerror!void {
         defer buffer.reset();
-        const result_ = buffer.toOwnedSliceLeaky();
+        const result_ = buffer.slice();
         var result = result_;
 
         while (result.len > 0) {
@@ -5955,9 +5955,9 @@ pub const BufferWriter = struct {
 
         if (ctx.append_null_byte) {
             ctx.sentinel = ctx.buffer.toOwnedSentinelLeaky();
-            ctx.written = ctx.buffer.toOwnedSliceLeaky();
+            ctx.written = ctx.buffer.slice();
         } else {
-            ctx.written = ctx.buffer.toOwnedSliceLeaky();
+            ctx.written = ctx.buffer.slice();
         }
     }
 
diff --git a/src/renamer.zig b/src/renamer.zig
index 64e9e93e56ea6..c41e4ca66c2f8 100644
--- a/src/renamer.zig
+++ b/src/renamer.zig
@@ -751,9 +751,9 @@ pub const NumberRenamer = struct {
                     mutable_name.appendSlice(prefix) catch unreachable;
                     mutable_name.appendInt(tries) catch unreachable;
 
-                    switch (NameUse.find(this, mutable_name.toOwnedSliceLeaky())) {
+                    switch (NameUse.find(this, mutable_name.slice())) {
                         .unused => {
-                            name = mutable_name.toOwnedSliceLeaky();
+                            name = mutable_name.slice();
 
                             if (use == .same_scope) {
                                 const existing = this.name_counts.getOrPut(allocator, prefix) catch unreachable;
@@ -775,7 +775,7 @@ pub const NumberRenamer = struct {
 
                                 tries += 1;
 
-                                switch (NameUse.find(this, mutable_name.toOwnedSliceLeaky())) {
+                                switch (NameUse.find(this, mutable_name.slice())) {
                                     .unused => {
                                         if (cur_use == .same_scope) {
                                             const existing = this.name_counts.getOrPut(allocator, prefix) catch unreachable;
@@ -790,7 +790,7 @@ pub const NumberRenamer = struct {
                                             existing.value_ptr.* = tries;
                                         }
 
-                                        name = mutable_name.toOwnedSliceLeaky();
+                                        name = mutable_name.slice();
                                         break;
                                     },
                                     else => {},
@@ -847,7 +847,7 @@ pub const ExportRenamer = struct {
                 var writer = this.string_buffer.writer();
                 writer.print("{s}{d}", .{ input, tries }) catch unreachable;
                 tries += 1;
-                const attempt = this.string_buffer.toOwnedSliceLeaky();
+                const attempt = this.string_buffer.slice();
                 entry = this.used.getOrPut(attempt) catch unreachable;
                 if (!entry.found_existing) {
                     const to_use = this.string_buffer.allocator.dupe(u8, attempt) catch unreachable;
diff --git a/src/sourcemap/CodeCoverage.zig b/src/sourcemap/CodeCoverage.zig
index eb3b4e0343d70..52d3624143ff4 100644
--- a/src/sourcemap/CodeCoverage.zig
+++ b/src/sourcemap/CodeCoverage.zig
@@ -695,7 +695,7 @@ pub const ByteRangeMapping = struct {
             return .zero;
         };
 
-        var str = bun.String.createUTF8(mutable_str.toOwnedSliceLeaky());
+        var str = bun.String.createUTF8(mutable_str.slice());
         defer str.deref();
         return str.toJS(globalThis);
     }
diff --git a/src/string_mutable.zig b/src/string_mutable.zig
index d787c9a3ab2e2..49d248dc9c1da 100644
--- a/src/string_mutable.zig
+++ b/src/string_mutable.zig
@@ -172,17 +172,16 @@ pub const MutableString = struct {
         try self.list.ensureUnusedCapacity(self.allocator, amount);
     }
 
-    pub inline fn appendSlice(self: *MutableString, slice: []const u8) !void {
-        try self.list.appendSlice(self.allocator, slice);
+    pub inline fn appendSlice(self: *MutableString, items: []const u8) !void {
+        try self.list.appendSlice(self.allocator, items);
     }
 
-    pub inline fn appendSliceExact(self: *MutableString, slice: []const u8) !void {
+    pub inline fn appendSliceExact(self: *MutableString, items: []const u8) !void {
         if (slice.len == 0) return;
-
-        try self.list.ensureTotalCapacityPrecise(self.allocator, self.list.items.len + slice.len);
+        try self.list.ensureTotalCapacityPrecise(self.allocator, self.list.items.len + items.len);
         var end = self.list.items.ptr + self.list.items.len;
-        self.list.items.len += slice.len;
-        @memcpy(end[0..slice.len], slice);
+        self.list.items.len += items.len;
+        @memcpy(end[0..items.len], items);
     }
 
     pub inline fn reset(
@@ -237,7 +236,7 @@ pub const MutableString = struct {
         return self.list.toOwnedSlice(self.allocator) catch bun.outOfMemory(); // TODO
     }
 
-    pub fn toOwnedSliceLeaky(self: *MutableString) []u8 {
+    pub fn slice(self: *MutableString) []u8 {
         return self.list.items;
     }
 
@@ -264,10 +263,6 @@ pub const MutableString = struct {
         return self.list.toOwnedSlice(self.allocator) catch bun.outOfMemory(); // TODO
     }
 
-    // pub fn deleteAt(self: *MutableString, i: usize)  {
-    //     self.list.swapRemove(i);
-    // }
-
     pub fn containsChar(self: *const MutableString, char: u8) bool {
         return self.indexOfChar(char) != null;
     }