Add bgzf cache

Author: cmdcolin

CHANGELOG.md

@@ -1,27 +1,15 @@
 ## [3.0.5](https://github.com/GMOD/tabix-js/compare/v3.0.4...v3.0.5) (2025-05-26)
 
-
-
 ## [3.0.4](https://github.com/GMOD/tabix-js/compare/v3.0.3...v3.0.4) (2025-05-13)
 
-
-
 ## [3.0.3](https://github.com/GMOD/tabix-js/compare/v3.0.2...v3.0.3) (2025-05-13)
 
-
-
 ## [3.0.2](https://github.com/GMOD/tabix-js/compare/v3.0.1...v3.0.2) (2025-04-30)
 
-
-
 ## [3.0.1](https://github.com/GMOD/tabix-js/compare/v3.0.0...v3.0.1) (2025-04-30)
 
-
-
 # [3.0.0](https://github.com/GMOD/tabix-js/compare/v2.0.5...v3.0.0) (2025-04-30)
 
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 ## [2.0.5](https://github.com/GMOD/tabix-js/compare/v2.0.4...v2.0.5) (2025-03-18)
 
 ## [2.0.4](https://github.com/GMOD/tabix-js/compare/v2.0.3...v2.0.4) (2024-12-18)

README.md

@@ -179,7 +179,6 @@ console.log(lines)
 
 - `args`
   **[object](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object)** 
-
   - `args.path`
     **[string](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String)?** 
   - `args.filehandle` **filehandle?** 

package.json

@@ -63,7 +63,7 @@
     "documentation": "^14.0.3",
     "eslint": "^9.9.0",
     "eslint-plugin-import": "^2.31.0",
-    "eslint-plugin-unicorn": "^59.0.0",
+    "eslint-plugin-unicorn": "^60.0.0",
     "prettier": "^3.3.3",
     "rimraf": "^6.0.1",
     "standard-changelog": "^7.0.1",

src/tabixIndexedFile.ts

@@ -35,6 +35,9 @@ export default class TabixIndexedFile {
   private index: IndexFile
   private renameRefSeq: (n: string) => string
   private chunkCache: AbortablePromiseCache<Chunk, ReadChunk>
+  public cache = new LRU<string, { buffer: Uint8Array; nextIn: number }>({
+    maxSize: 1000,
+  })
 
   /**
    * @param {object} args
@@ -507,6 +510,6 @@ export default class TabixIndexedFile {
       c.minv.blockPosition,
       opts,
     )
-    return unzipChunkSlice(ret, c)
+    return unzipChunkSlice(ret, c, this.cache)
   }
 }