HBASE-28821: Optimise the memory-utilisation during persistence of bucketcache.

[jhungund]

During the serialisation of backing map of bucketcache persistence, we create a new BackingMapEntry.Builder object for every entry in the bucket map. This can be optimized by creating a single builder object and reusing it for every entry object.

Change-Id: I6f6c05dfa256ce964cd1d66e5050d9424db4be46

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 44s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	hbaseanti	0m 0s		Patch does not have any anti-patterns.
			_ master Compile Tests _
+1 💚	mvninstall	3m 5s		master passed
+1 💚	compile	2m 58s		master passed
+1 💚	checkstyle	0m 38s		master passed
+1 💚	spotbugs	1m 38s		master passed
+1 💚	spotless	0m 45s		branch has no errors when running spotless:check.
			_ Patch Compile Tests _
+1 💚	mvninstall	2m 54s		the patch passed
+1 💚	compile	3m 5s		the patch passed
+1 💚	javac	3m 5s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 38s		the patch passed
+1 💚	spotbugs	1m 41s		the patch passed
+1 💚	hadoopcheck	10m 32s		Patch does not cause any errors with Hadoop 3.3.6 3.4.0.
+1 💚	spotless	0m 44s		patch has no errors when running spotless:check.
			_ Other Tests _
+1 💚	asflicense	0m 12s		The patch does not generate ASF License warnings.
		36m 13s

Subsystem	Report/Notes
Docker	ClientAPI=1.47 ServerAPI=1.47 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-6215/1/artifact/yetus-general-check/output/Dockerfile
GITHUB PR	#6215
JIRA Issue	HBASE-28821
Optional Tests	dupname asflicense javac spotbugs checkstyle codespell detsecrets compile hadoopcheck hbaseanti spotless
uname	Linux 9621eca34afc 5.4.0-186-generic #206-Ubuntu SMP Fri Apr 26 12:31:10 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / c7347ee
Default Java	Eclipse Adoptium-17.0.11+9
Max. process+thread count	85 (vs. ulimit of 30000)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-6215/1/console
versions	git=2.34.1 maven=3.9.8 spotbugs=4.7.3
Powered by	Apache Yetus 0.15.0 https://yetus.apache.org

This message was automatically generated.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 36s		Docker mode activated.
-0 ⚠️	yetus	0m 3s		Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --author-ignore-list --blanks-eol-ignore-file --blanks-tabs-ignore-file --quick-hadoopcheck
			_ Prechecks _
			_ master Compile Tests _
+1 💚	mvninstall	3m 45s		master passed
+1 💚	compile	1m 12s		master passed
+1 💚	javadoc	0m 34s		master passed
+1 💚	shadedjars	6m 18s		branch has no errors when building our shaded downstream artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	3m 5s		the patch passed
+1 💚	compile	0m 57s		the patch passed
+1 💚	javac	0m 57s		the patch passed
+1 💚	javadoc	0m 27s		the patch passed
+1 💚	shadedjars	5m 45s		patch has no errors when building our shaded downstream artifacts.
			_ Other Tests _
+1 💚	unit	227m 15s		hbase-server in the patch passed.
		254m 27s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-6215/1/artifact/yetus-jdk17-hadoop3-check/output/Dockerfile
GITHUB PR	#6215
JIRA Issue	HBASE-28821
Optional Tests	javac javadoc unit compile shadedjars
uname	Linux d4a45f001109 5.4.0-1103-aws #111~18.04.1-Ubuntu SMP Tue May 23 20:04:10 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / c7347ee
Default Java	Eclipse Adoptium-17.0.11+9
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-6215/1/testReport/
Max. process+thread count	5408 (vs. ulimit of 30000)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-6215/1/console
versions	git=2.34.1 maven=3.9.8
Powered by	Apache Yetus 0.15.0 https://yetus.apache.org

This message was automatically generated.