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optimize splay tree #907

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optimize splay tree #907

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539490b
optimize splay tree
m4ushold Oct 2, 2024
0329ccd
Refactor code based on CodeRabbit AI recommendations
m4ushold Oct 2, 2024
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15 changes: 15 additions & 0 deletions packages/sdk/src/util/splay_tree.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -170,9 +170,12 @@ export abstract class SplayNode<V> {
*/
export class SplayTree<V> {
private root?: SplayNode<V>;
private linearCount : number;
private firstNode? : SplayNode<V>;

constructor(root?: SplayNode<V>) {
this.root = root;
this.linearCount = 0;
}

/**
Expand Down Expand Up @@ -257,6 +260,18 @@ export class SplayTree<V> {
return newNode;
}

if (target == this.root) {
this.linearCount++;
if (this.linearCount==1) {
this.firstNode = newNode;
} else if (this.linearCount > 500) {
this.splayNode(this.firstNode);
this.linearCount = 0;
Comment on lines +269 to +270
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⚠️ Potential issue

Ensure firstNode is defined before splaying

Although firstNode should be defined when linearCount > 500, adding a safety check can prevent unexpected errors if the state changes in the future.

Apply this diff to add a null check:

   } else if (this.linearCount > 500) {
+    if (this.firstNode) {
       this.splayNode(this.firstNode);
+    }
     this.linearCount = 0;

Committable suggestion was skipped due to low confidence.

}
} else {
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⚠️ Potential issue

Use strict equality === instead of ==

Using strict equality ensures both value and type are compared, preventing potential bugs with type coercion.

Apply this diff to use strict equality:

-if (target == this.root) {
+if (target === this.root) {
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
if (target == this.root) {
this.linearCount++;
if (this.linearCount==1) {
this.firstNode = newNode;
} else if (this.linearCount > 500) {
this.splayNode(this.firstNode);
this.linearCount = 0;
}
} else {
if (target === this.root) {
this.linearCount++;
if (this.linearCount==1) {
this.firstNode = newNode;
} else if (this.linearCount > 500) {
this.splayNode(this.firstNode);
this.linearCount = 0;
}
} else {

this.linearCount = 0;
}

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🛠️ Refactor suggestion

Make the splay threshold configurable

Hardcoding the value 500 limits flexibility. Defining it as a constant or making it configurable allows for easier tuning based on different use cases.

Define a constant at the top of the class:

 export class SplayTree<V> {
   private root?: SplayNode<V>;
+  private static readonly SPLAY_THRESHOLD = 500;
   private linearCount: number;
   private firstNode?: SplayNode<V>;

Update the code to use the constant:

-  } else if (this.linearCount > 500) {
+  } else if (this.linearCount > SplayTree.SPLAY_THRESHOLD) {

Committable suggestion was skipped due to low confidence.

this.splayNode(target);
this.root = newNode;
newNode.setRight(target.getRight());
Expand Down
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