Avoid a clone when creating a Glsl shader (#5118)

CHANGELOG.md

@@ -84,6 +84,7 @@ Bottom level categories:
 - Fix performance regression when allocating a large amount of resources of the same type. By @nical in [#5229](https://github.com/gfx-rs/wgpu/pull/5229)
 - Fix docs.rs wasm32 builds. By @cwfitzgerald in [#5310](https://github.com/gfx-rs/wgpu/pull/5310)
 - Improve error message when binding count limit hit. By @hackaugusto in [#5298](https://github.com/gfx-rs/wgpu/pull/5298)
+- Remove an unnecessary `clone` during GLSL shader injestion. By @a1phyr in [#5118](https://github.com/gfx-rs/wgpu/pull/5118).
 
 #### DX12
 - Fix `panic!` when dropping `Instance` without `InstanceFlags::VALIDATION`. By @hakolao in [#5134](https://github.com/gfx-rs/wgpu/pull/5134)

wgpu/src/backend/wgpu_core.rs

@@ -852,13 +852,10 @@ impl crate::Context for ContextWgpuCore {
             ShaderSource::Glsl {
                 ref shader,
                 stage,
-                ref defines,
+                defines,
             } => {
                 // Parse the given shader code and store its representation.
-                let options = naga::front::glsl::Options {
-                    stage,
-                    defines: defines.clone(),
-                };
+                let options = naga::front::glsl::Options { stage, defines };
                 let mut parser = naga::front::glsl::Frontend::default();
                 let module = parser.parse(&options, shader).unwrap();