Use defaultInitialFetchSize for both metadata and cachedAsyncBuffer

package.json

@@ -37,9 +37,9 @@
     "@vitest/coverage-v8": "3.0.9",
     "eslint": "9.22.0",
     "eslint-plugin-jsdoc": "50.6.8",
-    "hyparquet-compressors": "1.0.0",
+    "hyparquet-compressors": "1.1.1",
     "typescript": "5.8.2",
-    "typescript-eslint": "8.26.1",
+    "typescript-eslint": "8.27.0",
     "vitest": "3.0.9"
   }
 }

src/metadata.js

@@ -3,6 +3,8 @@ import { parseDecimal, parseFloat16 } from './convert.js'
 import { getSchemaPath } from './schema.js'
 import { deserializeTCompactProtocol } from './thrift.js'
 
+export const defaultInitialFetchSize = 1 << 19 // 512kb
+
 /**
  * Read parquet metadata from an async buffer.
  *
@@ -27,7 +29,7 @@ import { deserializeTCompactProtocol } from './thrift.js'
  * @param {number} initialFetchSize initial fetch size in bytes (default 512kb)
  * @returns {Promise<FileMetaData>} parquet metadata object
  */
-export async function parquetMetadataAsync(asyncBuffer, initialFetchSize = 1 << 19 /* 512kb */) {
+export async function parquetMetadataAsync(asyncBuffer, initialFetchSize = defaultInitialFetchSize) {
   if (!asyncBuffer || !(asyncBuffer.byteLength >= 0)) throw new Error('parquetMetadataAsync expected AsyncBuffer')
 
   // fetch last bytes (footer) of the file

src/utils.js

@@ -1,3 +1,5 @@
+import { defaultInitialFetchSize } from './metadata.js'
+
 /**
  * Replace bigint, date, etc with legal JSON types.
  * When parsing parquet files, bigints are used to represent 64-bit integers.
@@ -169,7 +171,7 @@ function readStreamToArrayBuffer(input) {
  * @param {{ minSize?: number }} [options]
  * @returns {AsyncBuffer} cached file-like object
  */
-export function cachedAsyncBuffer({ byteLength, slice }, { minSize = 50000 } = {}) {
+export function cachedAsyncBuffer({ byteLength, slice }, { minSize = defaultInitialFetchSize } = {}) {
   if (byteLength < minSize) {
     // Cache whole file if it's small
     const buffer = slice(0, byteLength)