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Thomas Schatzl
Consulting Member of Technical Staff
Thomas currently works as a developer in the Hotspot GC team at Oracle. He has been contributing to the HotSpot garbage collectors since 2012 and is part of the HotSpot GC team since 2013.
Posts
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JEP targeted to JDK 27: 523: Make G1 the Default Garbage Collector in All Environments
on May 26, 2026JDK 27GC
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JDK 26 G1/Parallel/Serial GC changes
on February 28, 2026JDK 26GC
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JEP targeted to JDK 26: 522: G1 GC: Improve Throughput by Reducing Synchronization
on November 5, 2025JDK 26GC
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JDK 25 G1/Parallel/Serial GC changes
on September 8, 2025JDK 25GC
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JDK 24 G1/Parallel/Serial GC Changes
on April 7, 2025JDK 24GC
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New Write Barriers for G1
on April 2, 2025GCPerformance
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JDK 23 G1/Parallel/Serial GC changes
on July 24, 2024JDK 23GC
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JDK 22 G1/Parallel/Serial GC changes
on February 9, 2024JDK 22GCPerformance
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What is… a Concurrent Undo Cycle
on October 4, 2023JDK 21JDK 17GC
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G1/Parallel/Serial GC improvements in JDK 21
on August 10, 2023JDK 21GC
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G1/Parallel/Serial GC improvements in JDK 20
on March 17, 2023JDK 20GC
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G1/Parallel/Serial GC improvements in JDK 19
on September 21, 2022JDK 19GC
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Concurrent Marking in G1
on August 18, 2022JDK 20JDK 19GC
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G1/Parallel/Serial GC improvements in JDK 18
on March 16, 2022JDK 18GC
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Card Table Card Size Shenanigans
on February 16, 2022JDK 18GC
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Heap Regions X-Large
on November 15, 2021JDK 18GC
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G1 GC & Parallel GC Improvements in JDK 17
on September 17, 2021JDK 17GC
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G1 & Parallel GC Improvements in JDK 16
on March 15, 2021JDK 16GC
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Welcome 20% less memory usage for G1 remembered sets - Prune collection set candidates early
on February 26, 2021JDK 17GC
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JDK 15 G1/Parallel GC changes
on September 1, 2020JDK 15GC
