Java

openjdk 21 · openjdk/zgc 21

#11

Overall rank

6.10×

Score

16/17

Problems covered

0

Did not finish

Best result per problem

Problem	Rank	Code	Time	Peak mem
binarytrees	#3 of 19	2.java	450ms	128.6MB
coro-prime-sieve	#15 of 19	1.java	2.94s	93.2MB
edigits	#14 of 19	1.java	1.21s	462.7MB
fannkuch-redux	#3 of 19	1.java	1.43s	85.0MB
fasta	#12 of 19	4.java	309ms	67.3MB
http-server	#17 of 19	1.java	2.03s	354.4MB
json-serde	#12 of 19	1.java	1.15s	336.1MB
lru	#8 of 19	1.java	170ms	83.3MB
mandelbrot	#13 of 19	1b.java	850ms	87.4MB
merkletrees	#5 of 19	1.java	300ms	111.1MB
nbody	#11 of 19	1.java	193ms	65.9MB
nsieve	#6 of 19	2.java	460ms	75.9MB
pidigits	#13 of 19	1.java	2.67s	936.7MB
regex-redux	#14 of 18	3.java	3.63s	393.3MB
secp256k1	#12 of 19	1.java	2.22s	102.6MB
spectral-norm	#6 of 19	2.java	1.57s	84.0MB

Head to head

Compare with

Java is faster on 3 of 16 shared problems

Problem	Java	C++	Faster by
binarytrees	450ms	649ms	Java 1.44×
coro-prime-sieve	2.94s	53ms	C++ 55.17×
edigits	1.21s	24ms	C++ 50.33×
fannkuch-redux	1.43s	1.76s	Java 1.23×
fasta	309ms	242ms	C++ 1.28×
http-server	2.03s	27ms	C++ 74.25×
json-serde	1.15s	327ms	C++ 3.51×
lru	170ms	96ms	C++ 1.76×
mandelbrot	850ms	758ms	C++ 1.12×
merkletrees	300ms	300ms	Java 1.00×
nbody	193ms	118ms	C++ 1.64×
nsieve	460ms	276ms	C++ 1.66×
pidigits	2.67s	180ms	C++ 14.90×
regex-redux	3.63s	658ms	C++ 5.52×
secp256k1	2.22s	430ms	C++ 5.16×
spectral-norm	1.57s	1.32s	C++ 1.19×

Over time

Overall score after each run on Apple M5 laptop. Lower is faster.

Recent runs, newest first
Run	Version	Rank	Score	Change
Oct 20, 2026	openjdk 21 · openjdk/zgc 21	#11	6.10×	no change
Oct 20, 2026	openjdk 21 · openjdk/zgc 21	#11	6.10×	106.1% slower
Oct 19, 2026	openjdk 21 · openjdk/zgc 21	#6	2.96×	–