fix: add tfrecords buffer size in bytes for tfrecords dataset

tensorflow_asr/datasets.py

@@ -25,9 +25,11 @@
 
 # An ASR dataset is some `.tsv` files in format: `PATH\tDURATION\tTRANSCRIPT`. You must create those files by your own with your own data and methods.
 
-# **Note**: Each `.tsv` file must include a header `PATH\tDURATION\tTRANSCRIPT` because it will remove these headers when loading dataset, otherwise you will lose 1 data file :sob:
+# **Note**: Each `.tsv` file must include a header `PATH\tDURATION\tTRANSCRIPT`
+# because it will remove these headers when loading dataset, otherwise you will lose 1 data file :sob:
 
-# **For transcript**, if you want to include characters such as dots, commas, double quote, etc.. you must create your own `.txt` vocabulary file. Default is [English](../featurizers/english.txt)
+# **For transcript**, if you want to include characters such as dots, commas, double quote, etc.. you must create your own `.txt` vocabulary file.
+# Default is [English](../featurizers/english.txt)
 
 # **Inputs**
 
@@ -141,8 +143,9 @@ def get_global_shape(
 
 
 BUFFER_SIZE = 100
+TFRECORD_BUFFER_SIZE = 32 * 1024 * 1024
 TFRECORD_SHARDS = 16
-AUTOTUNE = int(os.environ.get("AUTOTUNE") or tf.data.experimental.AUTOTUNE)
+AUTOTUNE = int(os.environ.get("AUTOTUNE") or tf.data.AUTOTUNE)
 
 
 class BaseDataset:
@@ -416,6 +419,7 @@ def __init__(
         indefinite: bool = True,
         drop_remainder: bool = True,
         buffer_size: int = BUFFER_SIZE,
+        tfrecords_buffer_size: int = TFRECORD_BUFFER_SIZE,
         compression_type: str = "GZIP",
         sample_rate: int = 16000,
         name: str = "",
@@ -442,6 +446,7 @@ def __init__(
         if tfrecords_shards <= 0:
             raise ValueError("tfrecords_shards must be positive")
         self.tfrecords_shards = tfrecords_shards
+        self.tfrecords_buffer_size = tfrecords_buffer_size
         self.compression_type = compression_type
 
     def write_tfrecord_file(self, splitted_entries: tuple):
@@ -506,7 +511,9 @@ def create(self, batch_size: int, padded_shapes=None):
         ignore_order = tf.data.Options()
         ignore_order.deterministic = False
         files_ds = files_ds.with_options(ignore_order)
-        dataset = tf.data.TFRecordDataset(files_ds, compression_type=self.compression_type, num_parallel_reads=AUTOTUNE)
+        dataset = tf.data.TFRecordDataset(
+            files_ds, compression_type=self.compression_type, buffer_size=self.tfrecords_buffer_size, num_parallel_reads=AUTOTUNE
+        )
 
         return self.process(dataset, batch_size, padded_shapes=padded_shapes)