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https://issues.apache.org/jira/browse/SPARK-53082?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun updated SPARK-53082:
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Description:
`Files.readString` is roughly 3 times faster.
**BEFORE**
{code}
scala> spark.time(org.apache.commons.io.FileUtils.readFileToString(new
java.io.File("/tmp/500000000_byte")).length)
Time taken: 347 ms
{code}
**AFTER**
{code}
scala>
spark.time(java.nio.file.Files.readString(java.nio.file.Path.of("/tmp/500000000_byte")).length)
Time taken: 144 ms
{code}
> Use Java `Files.readString` instead of `FileUtils.readFileToString`
> -------------------------------------------------------------------
>
> Key: SPARK-53082
> URL: https://issues.apache.org/jira/browse/SPARK-53082
> Project: Spark
> Issue Type: Sub-task
> Components: Spark Core, SQL, Tests
> Affects Versions: 4.1.0
> Reporter: Dongjoon Hyun
> Assignee: Dongjoon Hyun
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.1.0
>
>
> `Files.readString` is roughly 3 times faster.
> **BEFORE**
> {code}
> scala> spark.time(org.apache.commons.io.FileUtils.readFileToString(new
> java.io.File("/tmp/500000000_byte")).length)
> Time taken: 347 ms
> {code}
> **AFTER**
> {code}
> scala>
> spark.time(java.nio.file.Files.readString(java.nio.file.Path.of("/tmp/500000000_byte")).length)
> Time taken: 144 ms
> {code}
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