README.md

JVM Anatomy Quarks

深入剖析JVM实现细节(系列)

About, Disclaimers, Contacts "JVM Anatomy Quarks" is the on-going mini-post series, where every post is describing some elementary piece of knowledge about JVM. The name underlines the fact that the single post cannot be taken in isolation, and most pieces described here are going to readily interact with each other.

The post should take about 5-10 minutes to read. As such, it goes deep for only a single topic, a single test, a single benchmark, a single observation. The evidence and discussion here might be anecdotal, not actually reviewed for errors, consistency, writing 'tyle, syntaxtic and semantically errors, duplicates, or also consistency. Use and/or trust this at your own risk.

Aleksey Shipilёv, JVM/Performance Geek, redhat logo Shout out at Twitter: @shipilev Questions, comments, suggestions: aleksey@shipilev.net

Compiler	Runtime	GC	Library	Link
x				#1: Lock Coarsening and Loops
	x	x		#2: Transparent Huge Pages
		x		#3: GC Design and Pauses
	x	x		#4: TLAB Allocation
	x	x		#5: TLABs and Heap Parsability
	x	x		#6: New Object Stages
	x	x		#7: Object Initialization Costs
x		x		#8: Local Variable Reachability
	x	x		#9: JNI Critical and GC Locker
	x	x	x	#10: String.intern()
		x		#11: Moving GC and Locality
	x			#12: Native Memory Tracking
		x		#13: Intergenerational Barriers
x				#14: Constant Variables
x				#15: Just-In-Time Constants
x	x			#16: Megamorphic Virtual Calls
x				#17: Trust Non-Static Final Fields
x				#18: Scalar Replacement
x				#19: Lock Elision
x				#20: FPU Spills
		x		#21: Heap Uncommit
x	x	x		#22: Safepoint Polls
	x			#23: Compressed References
	x			#24: Object Alignment
x	x			#25: Implicit Null Checks

• https://shipilev.net/jvm/anatomy-quarks/