Yicong-Huang commented on code in PR #4876:
URL: https://github.com/apache/texera/pull/4876#discussion_r3178848706
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amber/src/main/scala/org/apache/texera/web/service/ExecutionResultService.scala:
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@@ -98,17 +98,15 @@ object ExecutionResultService {
value match {
case byteArray: Array[Byte] =>
val totalSize = byteArray.length
- val hexString = byteArrayToHexString(byteArray)
-
- // 39 = 30 (leading bytes) + 9 (trailing bytes)
- // 30 bytes = space for 10 hex values (each hex value
takes 2 chars + 1 space)
- // 9 bytes = space for 3 hex values at the end (2
chars each + 1 space)
- if (hexString.length < 39) {
- s"bytes'$hexString' (length: $totalSize)"
+ // Slice the byte array before hex-encoding to avoid
materializing
+ // an O(N) string for large blobs (e.g. 50 MB -> ~150
MB hex string).
+ // 13 bytes is the threshold: hex length = 3*N-1, so
13 bytes = 38 chars < 39.
+ if (totalSize <= 13) {
Review Comment:
we used to use 39 bytes. why drop to 13?
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