Alpha software: FOSSbench scores have not yet been tested to be 100% accurate.
FOSSbench
Results›Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz›Individual run

Individual benchmark run

Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz

Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz · tested Jul 25, 2026, 5:38 PM

In Review · not yet included in the processor average

C score48,045ASM score: 38,647

System information

Processor
Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz
Computer model
Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz
Architecture
x86-64
Physical cores reported by run
6
Hardware threads reported by run
6
L1 cache
64 MB
L2 cache
256 MB
L3 cache
9,216 MB
Memory
32,012 MB
Operating system
Arch Linux
Kernel
Linux 7.0.11-arch1-1
Compiler
GCC 13.3.0
FOSSbench version
0.4.2
Total test time
1 min 19 sec

Score summary

C multi-core48,045
C single-core11,386
ASM multi-core38,647
ASM single-core8,576

Test environment

Background monitoring
Available
Average background CPU use
1.3%
Peak background CPU use
1.8%
Available memory before test
30,574 MB
Running processes
255
Activity sample duration
10 seconds

Individual workload results

WorkloadRunMeasured performanceRaw throughputScoreElapsedIterationsThreadsChecksum
Native Integer Mathcommon 32-bit multiply/add/rotate mix10% of overall scoreMulti-core41,081.9 Mops/s41,081.9 million work units/sec133,1230.52 seconds2,239624546381138
Single-core7,168.09 Mops/s7,168.09 million work units/sec23,2280.52 seconds2,31713702065510
Wide Integer Math64-bit ALU: imul, mul, div, bitops10% of overall scoreMulti-core33,534.5 Mops/s33,534.5 million work units/sec108,6670.52 seconds1,217613441540787085652576
Single-core5,864.29 Mops/s5,864.29 million work units/sec19,0030.51 seconds1,239111200585294399891845
Floating Point Mathdouble: mulsd/addsd, divsd, sqrtsd10% of overall scoreMulti-core6,225.92 Mops/s6,225.92 million work units/sec37,0150.52 seconds27169288499184294064500
Single-core1,086.14 Mops/s1,086.14 million work units/sec6,4570.52 seconds28414622540543000602686
Prime Numberssieve of Eratosthenes to 2M10% of overall scoreMulti-core1,099.92 Mcand/s1,099.92 million work units/sec13,5460.52 seconds48642892704
Single-core473.6 Mcand/s473.6 million work units/sec5,8330.52 seconds124118467692
Extended InstructionsSSE2: 128-bit integer + float10% of overall scoreMulti-core115,284.23 Mops/s115,284.23 million work units/sec175,3110.42 seconds2,546620195849106
Single-core19,999.45 Mops/s19,999.45 million work units/sec30,4130.52 seconds3,2631166376934
CompressionLZ77 match finder, 4 MiB corpus10% of overall scoreMulti-core2,558.75 MB/s2,558.75 million work units/sec37,9640.53 seconds546544312872
Single-core446.97 MB/s446.97 million work units/sec6,6320.53 seconds56194078768
EncryptionChaCha20, 20 rounds, 1 MiB10% of overall scoreMulti-core2,835.27 MB/s2,835.27 million work units/sec69,8340.49 seconds222610445473302
Single-core496.07 MB/s496.07 million work units/sec12,2180.52 seconds24812362150758
Physics512-body direct-sum gravity10% of overall scoreMulti-core1,066.51 Mpair/s1,066.51 million work units/sec16,9020.59 seconds39869366224534408805380
Single-core184.17 Mpair/s184.17 million work units/sec2,9190.57 seconds39814635494768019726166
Sortingheapsort, 1M uint3210% of overall scoreMulti-core667.72 Mkey-cmp/s667.72 million work units/sec18,3950.57 seconds367992616892050158974
Single-core168.19 Mkey-cmp/s168.19 million work units/sec4,6330.62 seconds514406560160959951765
Memory Latencydependent-load pointer chase, 16 MiB0% of overall scoreMulti-core67.15 ns/access89.35 million work units/sec11,3100.54 seconds8644523448
Single-core37.7 ns/access26.53 million work units/sec3,3580.53 seconds141765736
Memory BandwidthSTREAM triad, 12 MiB working set per thread10% of overall scoreMulti-core20,008.89 MB/s20,008.89 million work units/sec62,5280.48 seconds12666410836128
Single-core21,155.76 MB/s21,155.76 million work units/sec66,1120.5 seconds84011066538048