Java-9-JEP254-Compact_Strings

#Compact Strings

Play and testing JEP 254: Compact Strings introduced in JDK 9.

Build

docker build -t compact-strings .

Run

docker run --rm --memory=256m compact-strings | tail -n 1

Results

Host MacBook Pro, CPU i7, 2,2 GHz, RAM 16 GB 1600 MHz DDR3

Docker Image	bits	--memory	Number of object instances
openjdk:8u242	64-bit	256m	205844, 205849, 205841, 205845
openjdk:8u242	64-bit	512m	209150, 209145, 209158, 209147
openjdk:8u242	64-bit	1024m	418579, 418577, 418563, 418585
openjdk:15.0.2	64-bit	256m	216496, 216509, 216501, 216501
openjdk:15.0.2	64-bit	512m	219993, 219988, 219985, 219992
openjdk:15.0.2	64-bit	1024m	440935, 440938, 440930, 440928
i386/openjdk:8u212-alpine	32-bit	256m	163860, 163861, 163855, 163861
i386/openjdk:8u212-alpine	32-bit	512m	219225, 219232, 219227, 219229
i386/openjdk:8u212-alpine	32-bit	1024m	438645, 438657, 438651, 438660