SmallString implementation

Cargo.lock

@@ -1492,6 +1492,26 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "profiling"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f61dcf0b917cd75d4521d7343d1ffff3d1583054133c9b5cbea3375c703c40d"
+dependencies = [
+ "profiling-procmacros",
+ "superluminal-perf",
+]
+
+[[package]]
+name = "profiling-procmacros"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "98eee3c112f2a6f784b6713fe1d7fb7d6506e066121c0a49371fdb976f72bae5"
+dependencies = [
+ "quote 1.0.18",
+ "syn",
+]
+
 [[package]]
 name = "quote"
 version = "0.6.13"
@@ -1796,7 +1816,15 @@ dependencies = [
 ]
 
 [[package]]
-name = "rojo"
+name = "rojo-insta-ext"
+version = "0.1.0"
+dependencies = [
+ "serde",
+ "serde_yaml",
+]
+
+[[package]]
+name = "rojo-smallstring"
 version = "7.1.1"
 dependencies = [
  "anyhow",
@@ -1822,6 +1850,7 @@ dependencies = [
  "opener",
  "paste",
  "pretty_assertions",
+ "profiling",
  "rbx_binary",
  "rbx_dom_weak",
  "rbx_reflection",
@@ -1834,6 +1863,7 @@ dependencies = [
  "serde",
  "serde_json",
  "serde_yaml",
+ "smol_str",
  "tempfile",
  "termcolor",
  "thiserror",
@@ -1843,14 +1873,6 @@ dependencies = [
  "winreg 0.10.1",
 ]
 
-[[package]]
-name = "rojo-insta-ext"
-version = "0.1.0"
-dependencies = [
- "serde",
- "serde_yaml",
-]
-
 [[package]]
 name = "rustc-demangle"
 version = "0.1.21"
@@ -2015,6 +2037,15 @@ version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eb703cfe953bccee95685111adeedb76fabe4e97549a58d16f03ea7b9367bb32"
 
+[[package]]
+name = "smol_str"
+version = "0.1.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7475118a28b7e3a2e157ce0131ba8c5526ea96e90ee601d9f6bb2e286a35ab44"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "snax"
 version = "0.2.0"
@@ -2046,6 +2077,21 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2d67a5a62ba6e01cb2192ff309324cb4875d0c451d55fe2319433abe7a05a8ee"
 
+[[package]]
+name = "superluminal-perf"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "80ed8ddf5d2a4a849fa7dc75b3e0be740adb882fe7fee87e79584402ac9b1e60"
+dependencies = [
+ "superluminal-perf-sys",
+]
+
+[[package]]
+name = "superluminal-perf-sys"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0342a02bcc62538822a46f54294130677f026666c2e19d078fc213b7bc07ff16"
+
 [[package]]
 name = "syn"
 version = "1.0.95"

Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "rojo"
+name = "rojo-smallstring"
 version = "7.1.1"
 authors = ["Lucien Greathouse <me@lpghatguy.com>"]
 description = "Enables professional-grade development tools for Roblox developers"
@@ -80,6 +80,8 @@ thiserror = "1.0.30"
 tokio = { version = "1.12.0", features = ["rt", "rt-multi-thread"] }
 uuid = { version = "1.0.0", features = ["v4", "serde"] }
 clap = { version = "3.1.18", features = ["derive"] }
+smol_str = "0.1.23"
+profiling = { version = "1.0.6", features = ["profile-with-superluminal"] }
 
 [target.'cfg(windows)'.dependencies]
 winreg = "0.10.1"

src/change_processor.rs

@@ -46,6 +46,7 @@ pub struct ChangeProcessor {
 impl ChangeProcessor {
     /// Spin up the ChangeProcessor, connecting it to the given tree, VFS, and
     /// outbound message queue.
+    #[profiling::function]
     pub fn start(
         tree: Arc<Mutex<RojoTree>>,
         vfs: Arc<Vfs>,

src/cli/build.rs

@@ -97,6 +97,7 @@ fn xml_encode_config() -> rbx_xml::EncodeOptions {
     rbx_xml::EncodeOptions::new().property_behavior(rbx_xml::EncodePropertyBehavior::WriteUnknown)
 }
 
+#[profiling::function]
 fn write_model(
     session: &ServeSession,
     output: &Path,

src/lib.rs

@@ -18,6 +18,7 @@ mod project;
 mod resolution;
 mod serve_session;
 mod session_id;
+mod small_string;
 mod snapshot;
 mod snapshot_middleware;
 mod web;

src/main.rs

@@ -6,6 +6,8 @@ use clap::Parser;
 use librojo::cli::Options;
 
 fn main() {
+    profiling::register_thread!("Main Thread");
+
     panic::set_hook(Box::new(|panic_info| {
         // PanicInfo's payload is usually a &'static str or String.
         // See: https://doc.rust-lang.org/beta/std/panic/struct.PanicInfo.html#method.payload

src/serve_session.rs

@@ -96,6 +96,7 @@ impl ServeSession {
     /// The project file is expected to be loaded out-of-band since it's
     /// currently loaded from the filesystem directly instead of through the
     /// in-memory filesystem layer.
+    #[profiling::function]
     pub fn new<P: AsRef<Path>>(vfs: Vfs, start_path: P) -> Result<Self, ServeSessionError> {
         let start_path = start_path.as_ref();
         let start_time = Instant::now();

src/small_string.rs

@@ -0,0 +1 @@
+pub use smol_str::SmolStr as SmallString;

src/snapshot/instance_snapshot.rs

@@ -1,6 +1,6 @@
 //! Defines the structure of an instance snapshot.
 
-use std::{borrow::Cow, collections::HashMap};
+use std::collections::HashMap;
 
 use rbx_dom_weak::{
     types::{Ref, Variant},
@@ -8,6 +8,8 @@ use rbx_dom_weak::{
 };
 use serde::{Deserialize, Serialize};
 
+use crate::small_string::SmallString;
+
 use super::InstanceMetadata;
 
 /// A lightweight description of what an instance should look like.
@@ -25,13 +27,13 @@ pub struct InstanceSnapshot {
     pub metadata: InstanceMetadata,
 
     /// Correpsonds to the Name property of the instance.
-    pub name: Cow<'static, str>,
+    pub name: SmallString,
 
     /// Corresponds to the ClassName property of the instance.
-    pub class_name: Cow<'static, str>,
+    pub class_name: SmallString,
 
     /// All other properties of the instance, weakly-typed.
-    pub properties: HashMap<String, Variant>,
+    pub properties: HashMap<SmallString, Variant>,
 
     /// The children of the instance represented as more snapshots.
     ///
@@ -44,37 +46,37 @@ impl InstanceSnapshot {
         Self {
             snapshot_id: None,
             metadata: InstanceMetadata::default(),
-            name: Cow::Borrowed("DEFAULT"),
+            name: "DEFAULT".into(),
-            class_name: Cow::Borrowed("DEFAULT"),
+            class_name: "DEFAULT".into(),
             properties: HashMap::new(),
             children: Vec::new(),
         }
     }
 
-    pub fn name(self, name: impl Into<String>) -> Self {
+    pub fn name(self, name: impl Into<SmallString>) -> Self {
         Self {
-            name: Cow::Owned(name.into()),
+            name: name.into(),
             ..self
         }
     }
 
-    pub fn class_name(self, class_name: impl Into<String>) -> Self {
+    pub fn class_name(self, class_name: impl Into<SmallString>) -> Self {
         Self {
-            class_name: Cow::Owned(class_name.into()),
+            class_name: class_name.into(),
             ..self
         }
     }
 
     pub fn property<K, V>(mut self, key: K, value: V) -> Self
     where
-        K: Into<String>,
+        K: Into<SmallString>,
         V: Into<Variant>,
     {
         self.properties.insert(key.into(), value.into());
         self
     }
 
-    pub fn properties(self, properties: impl Into<HashMap<String, Variant>>) -> Self {
+    pub fn properties(self, properties: impl Into<HashMap<SmallString, Variant>>) -> Self {
         Self {
             properties: properties.into(),
             ..self
@@ -112,12 +114,18 @@ impl InstanceSnapshot {
             .map(|id| Self::from_tree(tree, id))
             .collect();
 
+        let properties = instance
+            .properties
+            .iter()
+            .map(|(key, value)| (key.into(), value.clone()))
+            .collect();
+
         Self {
             snapshot_id: Some(id),
             metadata: InstanceMetadata::default(),
-            name: Cow::Owned(instance.name.clone()),
+            name: SmallString::from(&instance.name),
-            class_name: Cow::Owned(instance.class.clone()),
+            class_name: SmallString::from(&instance.class),
-            properties: instance.properties.clone(),
+            properties,
             children,
         }
     }

src/snapshot/patch.rs

@@ -5,6 +5,8 @@ use std::collections::HashMap;
 use rbx_dom_weak::types::{Ref, Variant};
 use serde::{Deserialize, Serialize};
 
+use crate::small_string::SmallString;
+
 use super::{InstanceMetadata, InstanceSnapshot};
 
 /// A set of different kinds of patches that can be applied to an WeakDom.
@@ -40,12 +42,12 @@ pub struct PatchAdd {
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct PatchUpdate {
     pub id: Ref,
-    pub changed_name: Option<String>,
+    pub changed_name: Option<SmallString>,
-    pub changed_class_name: Option<String>,
+    pub changed_class_name: Option<SmallString>,
 
     /// Contains all changed properties. If a property is assigned to `None`,
     /// then that property has been removed.
-    pub changed_properties: HashMap<String, Option<Variant>>,
+    pub changed_properties: HashMap<SmallString, Option<Variant>>,
 
     /// Changed Rojo-specific metadata, if any of it changed.
     pub changed_metadata: Option<InstanceMetadata>,
@@ -83,9 +85,9 @@ pub struct AppliedPatchUpdate {
     pub id: Ref,
 
     // TODO: Store previous values in order to detect application conflicts
-    pub changed_name: Option<String>,
+    pub changed_name: Option<SmallString>,
-    pub changed_class_name: Option<String>,
+    pub changed_class_name: Option<SmallString>,
-    pub changed_properties: HashMap<String, Option<Variant>>,
+    pub changed_properties: HashMap<SmallString, Option<Variant>>,
     pub changed_metadata: Option<InstanceMetadata>,
 }
 

src/snapshot/patch_apply.rs

@@ -4,6 +4,8 @@ use std::collections::HashMap;
 
 use rbx_dom_weak::types::{Ref, Variant};
 
+use crate::small_string::SmallString;
+
 use super::{
     patch::{AppliedPatchSet, AppliedPatchUpdate, PatchSet, PatchUpdate},
     InstanceSnapshot, RojoTree,
@@ -12,6 +14,7 @@ use super::{
 /// Consumes the input `PatchSet`, applying all of its prescribed changes to the
 /// tree and returns an `AppliedPatchSet`, which can be used to keep another
 /// tree in sync with Rojo's.
+#[profiling::function]
 pub fn apply_patch_set(tree: &mut RojoTree, patch_set: PatchSet) -> AppliedPatchSet {
     let mut context = PatchApplyContext::default();
 
@@ -68,7 +71,7 @@ struct PatchApplyContext {
     ///
     /// This doesn't affect updated instances, since they're always applied
     /// after we've added all the instances from the patch.
-    added_instance_properties: HashMap<Ref, HashMap<String, Variant>>,
+    added_instance_properties: HashMap<Ref, HashMap<SmallString, Variant>>,
 
     /// The current applied patch result, describing changes made to the tree.
     applied_patch_set: AppliedPatchSet,
@@ -100,7 +103,9 @@ fn finalize_patch_application(context: PatchApplyContext, tree: &mut RojoTree) -
                 }
             }
 
-            instance.properties_mut().insert(key, property_value);
+            instance
+                .properties_mut()
+                .insert(key.to_string(), property_value);
         }
     }
 
@@ -164,13 +169,13 @@ fn apply_update_child(context: &mut PatchApplyContext, tree: &mut RojoTree, patc
     };
 
     if let Some(name) = patch.changed_name {
-        *instance.name_mut() = name.clone();
+        *instance.name_mut() = name.to_string();
-        applied_patch.changed_name = Some(name);
+        applied_patch.changed_name = Some(name.into());
     }
 
     if let Some(class_name) = patch.changed_class_name {
-        *instance.class_name_mut() = class_name.clone();
+        *instance.class_name_mut() = class_name.to_string();
-        applied_patch.changed_class_name = Some(class_name);
+        applied_patch.changed_class_name = Some(class_name.into());
     }
 
     for (key, property_entry) in patch.changed_properties {
@@ -195,13 +200,15 @@ fn apply_update_child(context: &mut PatchApplyContext, tree: &mut RojoTree, patc
 
                 instance
                     .properties_mut()
-                    .insert(key.clone(), Variant::Ref(new_referent));
+                    .insert(key.to_string(), Variant::Ref(new_referent));
             }
             Some(ref value) => {
-                instance.properties_mut().insert(key.clone(), value.clone());
+                instance
+                    .properties_mut()
+                    .insert(key.to_string(), value.clone());
             }
             None => {
-                instance.properties_mut().remove(&key);
+                instance.properties_mut().remove(key.as_str());
             }
         }
 

src/snapshot/patch_compute.rs

@@ -10,6 +10,7 @@ use super::{
     InstanceSnapshot, InstanceWithMeta, RojoTree,
 };
 
+#[profiling::function]
 pub fn compute_patch_set(
     snapshot: Option<&InstanceSnapshot>,
     tree: &RojoTree,
@@ -102,13 +103,13 @@ fn compute_property_patches(
     let changed_name = if snapshot.name == instance.name() {
         None
     } else {
-        Some(snapshot.name.clone().into_owned())
+        Some(snapshot.name.clone())
     };
 
     let changed_class_name = if snapshot.class_name == instance.class_name() {
         None
     } else {
-        Some(snapshot.class_name.clone().into_owned())
+        Some(snapshot.class_name.clone())
     };
 
     let changed_metadata = if &snapshot.metadata == instance.metadata() {
@@ -120,7 +121,7 @@ fn compute_property_patches(
     for (name, snapshot_value) in &snapshot.properties {
         visited_properties.insert(name.as_str());
 
-        match instance.properties().get(name) {
+        match instance.properties().get(name.as_str()) {
             Some(instance_value) => {
                 if snapshot_value != instance_value {
                     changed_properties.insert(name.clone(), Some(snapshot_value.clone()));
@@ -137,7 +138,7 @@ fn compute_property_patches(
             continue;
         }
 
-        changed_properties.insert(name.clone(), None);
+        changed_properties.insert(name.into(), None);
     }
 
     if changed_properties.is_empty()

src/snapshot_middleware/csv.rs

@@ -30,7 +30,7 @@ pub fn snapshot_csv(
         .name(name)
         .class_name("LocalizationTable")
         .properties(hashmap! {
-            "Contents".to_owned() => table_contents.into(),
+            "Contents".into() => table_contents.into(),
         })
         .metadata(
             InstanceMetadata::new()

src/snapshot_middleware/json.rs

@@ -25,7 +25,7 @@ pub fn snapshot_json(
     let as_lua = json_to_lua(value).to_string();
 
     let properties = hashmap! {
-        "Source".to_owned() => as_lua.into(),
+        "Source".into() => as_lua.into(),
     };
 
     let meta_path = path.with_file_name(format!("{}.meta.json", name));

src/snapshot_middleware/json_model.rs

@@ -1,4 +1,4 @@
-use std::{borrow::Cow, collections::HashMap, path::Path, str};
+use std::{collections::HashMap, path::Path, str};
 
 use anyhow::Context;
 use memofs::Vfs;
@@ -85,14 +85,14 @@ impl JsonModelCore {
         let mut properties = HashMap::with_capacity(self.properties.len());
         for (key, unresolved) in self.properties {
             let value = unresolved.resolve(&class_name, &key)?;
-            properties.insert(key, value);
+            properties.insert(key.into(), value);
         }
 
         Ok(InstanceSnapshot {
             snapshot_id: None,
             metadata: Default::default(),
-            name: Cow::Owned(name),
+            name: name.into(),
-            class_name: Cow::Owned(class_name),
+            class_name: class_name.into(),
             properties,
             children,
         })

src/snapshot_middleware/lua.rs

@@ -38,7 +38,7 @@ pub fn snapshot_lua(
         .name(instance_name)
         .class_name(class_name)
         .properties(hashmap! {
-            "Source".to_owned() => contents_str.into(),
+            "Source".into() => contents_str.into(),
         })
         .metadata(
             InstanceMetadata::new()

src/snapshot_middleware/meta_file.rs

@@ -1,4 +1,4 @@
-use std::{borrow::Cow, collections::HashMap, path::PathBuf};
+use std::{collections::HashMap, path::PathBuf};
 
 use anyhow::{format_err, Context};
 use serde::{Deserialize, Serialize};
@@ -49,7 +49,7 @@ impl AdjacentMetadata {
                 .resolve(&snapshot.class_name, &key)
                 .with_context(|| format!("error applying meta file {}", path.display()))?;
 
-            snapshot.properties.insert(key, value);
+            snapshot.properties.insert(key.into(), value);
         }
 
         Ok(())
@@ -116,7 +116,7 @@ impl DirectoryMetadata {
                 ));
             }
 
-            snapshot.class_name = Cow::Owned(class_name);
+            snapshot.class_name = class_name.into();
         }
 
         Ok(())
@@ -136,7 +136,7 @@ impl DirectoryMetadata {
                 .resolve(&snapshot.class_name, &key)
                 .with_context(|| format!("error applying meta file {}", path.display()))?;
 
-            snapshot.properties.insert(key, value);
+            snapshot.properties.insert(key.into(), value);
         }
 
         Ok(())

src/snapshot_middleware/mod.rs

@@ -40,6 +40,7 @@ pub use self::project::snapshot_project_node;
 
 /// The main entrypoint to the snapshot function. This function can be pointed
 /// at any path and will return something if Rojo knows how to deal with it.
+#[profiling::function]
 pub fn snapshot_from_vfs(
     context: &InstanceContext,
     vfs: &Vfs,

src/snapshot_middleware/project.rs

@@ -6,6 +6,7 @@ use rbx_reflection::ClassTag;
 
 use crate::{
     project::{PathNode, Project, ProjectNode},
+    small_string::SmallString,
     snapshot::{
         InstanceContext, InstanceMetadata, InstanceSnapshot, InstigatingSource, PathIgnoreRule,
     },
@@ -67,13 +68,10 @@ pub fn snapshot_project_node(
 ) -> anyhow::Result<Option<InstanceSnapshot>> {
     let project_folder = project_path.parent().unwrap();
 
-    let class_name_from_project = node
+    let class_name_from_project = node.class_name.as_ref().map(|name| SmallString::from(name));
-        .class_name
-        .as_ref()
-        .map(|name| Cow::Owned(name.clone()));
     let mut class_name_from_path = None;
 
-    let name = Cow::Owned(instance_name.to_owned());
+    let name = SmallString::from(instance_name);
     let mut properties = HashMap::new();
     let mut children = Vec::new();
     let mut metadata = InstanceMetadata::default();
@@ -228,7 +226,7 @@ pub fn snapshot_project_node(
             _ => {}
         }
 
-        properties.insert(key.clone(), value);
+        properties.insert(key.into(), value);
     }
 
     // If the user specified $ignoreUnknownInstances, overwrite the existing
@@ -262,7 +260,7 @@ pub fn snapshot_project_node(
     }))
 }
 
-fn infer_class_name(name: &str, parent_class: Option<&str>) -> Option<Cow<'static, str>> {
+fn infer_class_name(name: &str, parent_class: Option<&str>) -> Option<SmallString> {
     // If className wasn't defined from another source, we may be able
     // to infer one.
 
@@ -275,13 +273,13 @@ fn infer_class_name(name: &str, parent_class: Option<&str>) -> Option<Cow<'stati
         let descriptor = rbx_reflection_database::get().classes.get(name)?;
 
         if descriptor.tags.contains(&ClassTag::Service) {
-            return Some(Cow::Owned(name.to_owned()));
+            return Some(name.into());
         }
     } else if parent_class == "StarterPlayer" {
         // StarterPlayer has two special members with their own classes.
 
         if name == "StarterPlayerScripts" || name == "StarterCharacterScripts" {
-            return Some(Cow::Owned(name.to_owned()));
+            return Some(name.into());
         }
     }
 

src/snapshot_middleware/txt.rs

@@ -21,7 +21,7 @@ pub fn snapshot_txt(
         .to_owned();
 
     let properties = hashmap! {
-        "Value".to_owned() => contents_str.into(),
+        "Value".into() => contents_str.into(),
     };
 
     let meta_path = path.with_file_name(format!("{}.meta.json", name));

src/web/interface.rs

@@ -12,6 +12,7 @@ use serde::{Deserialize, Serialize};
 
 use crate::{
     session_id::SessionId,
+    small_string::SmallString,
     snapshot::{
         AppliedPatchSet, InstanceMetadata as RojoInstanceMetadata, InstanceWithMeta, RojoTree,
     },
@@ -83,13 +84,13 @@ impl<'a> SubscribeMessage<'a> {
 #[serde(rename_all = "camelCase")]
 pub struct InstanceUpdate {
     pub id: Ref,
-    pub changed_name: Option<String>,
+    pub changed_name: Option<SmallString>,
-    pub changed_class_name: Option<String>,
+    pub changed_class_name: Option<SmallString>,
 
-    // TODO: Transform from HashMap<String, Option<_>> to something else, since
+    // TODO: Transform from HashMap<_, Option<_>> to something else, since
     // null will get lost when decoding from JSON in some languages.
     #[serde(default)]
-    pub changed_properties: HashMap<String, Option<Variant>>,
+    pub changed_properties: HashMap<SmallString, Option<Variant>>,
     pub changed_metadata: Option<InstanceMetadata>,
 }