Kotlin VS Java benchmarks

Current benchmark data was generated on Fri May 20 2022, full log can be found HERE

CONTRIBUTIONS are WELCOME!

[x86_64][2 cores] Intel(R) Xeon(R) Platinum 8370C CPU @ 2.80GHz (Model 106)

* -m in a file name stands for multi-threading or multi-processing

* -i in a file name stands for direct intrinsics usage. (Usage of simd intrinsics via libraries is not counted)

* -ffi in a file name stands for non-stdlib FFI usage

* (You may find time < time(user) + time(sys) for some non-parallelized programs, the overhead is from GC or JIT compiler, which are allowed to take advantage of multi-cores as that's more close to real-world scenarios.)

binarytrees

Input: 18

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2.java 696ms 2.2ms 409.6MB 713ms 83ms openjdk 19
java 2.java 732ms 12ms 407.3MB 713ms 120ms openjdk 18.0.1
kotlin 1.kt 733ms 92ms 842.9MB 710ms 130ms kotlin/jvm 17.0.2
java 2.java 1014ms 30ms 680.5MB 813ms 113ms graal/jvm 17.0.3
java 2.java 1293ms 8.5ms 1082.9MB 893ms 617ms openjdk/zgc 18.0.1
kotlin 1.kt 3949ms 18ms 514.4MB 3847ms 87ms kotlin/native 1.6.21

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 133ms 2.6ms 109.5MB 117ms 20ms kotlin/jvm 17.0.2
java 2.java 165ms 4.3ms 107.3MB 167ms 37ms openjdk 19
java 2.java 170ms 6.4ms 107.5MB 173ms 20ms openjdk 18.0.1
java 2.java 296ms 1.4ms 243.7MB 183ms 150ms openjdk/zgc 18.0.1
kotlin 1.kt 304ms 2.8ms 62.2MB 283ms 3ms kotlin/native 1.6.21
java 2.java 495ms 4.1ms 170.5MB 243ms 27ms graal/jvm 17.0.3

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 2944ms 38ms 157.9MB 3853ms 60ms kotlin/jvm 17.0.2
java 1-m.java 3243ms 64ms 199.4MB 6117ms 97ms loom 19
kotlin 2-m.kt 3273ms 617ms 187.2MB 6243ms 67ms kotlin/jvm 17.0.2
kotlin 1.kt timeout 0.0ms 0.0MB 0ms 0ms kotlin/native 1.6.21
kotlin 2-m.kt timeout 0.0ms 0.0MB 0ms 0ms kotlin/native 1.6.21

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1-m.kt 689ms 63ms 100.4MB 1230ms 27ms kotlin/jvm 17.0.2
java 1-m.java 731ms 33ms 110.8MB 1270ms 53ms loom 19
kotlin 2-m.kt 848ms 12ms 70.4MB 1487ms 23ms kotlin/native 1.6.21
kotlin 1.kt 1044ms 5.6ms 32.7MB 1030ms 7ms kotlin/native 1.6.21
kotlin 2-m.kt 1092ms 73ms 106.9MB 1977ms 57ms kotlin/jvm 17.0.2

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 2.5ms 0.4ms 1.2MB 0ms 0ms kotlin/native 1.6.21
kotlin 1.kt 66ms 2.9ms 40.8MB 52ms 8ms kotlin/jvm 17.0.2
java 1.java 71ms 3.3ms 59.7MB 64ms 14ms graal/jvm 17.0.3
java 1.java 75ms 4.6ms 38.7MB 76ms 6ms openjdk 18.0.1
java 1.java 78ms 3.9ms 38.4MB 76ms 6ms openjdk 19
java 1.java 115ms 2.8ms 38.3MB 76ms 52ms openjdk/zgc 18.0.1

http-server

Input: 3000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt timeout 0.0ms 0.0MB 0ms 0ms kotlin/jvm 17.0.2
kotlin 2.kt timeout 0.0ms 0.0MB 0ms 0ms kotlin/jvm 17.0.2

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 2-m.kt 2117ms 172ms 241.9MB 3383ms 230ms kotlin/jvm 17.0.2
kotlin 1-m.kt 2372ms 280ms 228.1MB 3690ms 287ms kotlin/jvm 17.0.2

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1-m.kt 1068ms 28ms 216.8MB 1817ms 83ms kotlin/jvm 17.0.2

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1-m.kt 3906ms 112ms 949.9MB 5693ms 247ms kotlin/jvm 17.0.2

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 2-m.kt 223ms 5.9ms 113.8MB 330ms 30ms kotlin/jvm 17.0.2
kotlin 1.kt 234ms 3.0ms 109.7MB 300ms 20ms kotlin/jvm 17.0.2
kotlin 2.kt 363ms 3.4ms 88.5MB 337ms 10ms kotlin/native 1.6.21
kotlin 1.kt timeout 0.0ms 0.0MB 0ms 0ms kotlin/native 1.6.21

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 2.kt 367ms 3.8ms 130.7MB 470ms 27ms kotlin/jvm 17.0.2
kotlin 1.kt 455ms 2.2ms 132.6MB 517ms 27ms kotlin/jvm 17.0.2
kotlin 2.kt 1125ms 1.8ms 134.1MB 1087ms 23ms kotlin/native 1.6.21
kotlin 1.kt timeout 0.0ms 0.0MB 0ms 0ms kotlin/native 1.6.21

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 173ms 4.0ms 74.2MB 237ms 17ms kotlin/jvm 17.0.2
kotlin 2.kt 174ms 8.8ms 42.1MB 163ms 0ms kotlin/native 1.6.21
kotlin 2-m.kt 186ms 22ms 83.1MB 273ms 20ms kotlin/jvm 17.0.2
kotlin 1.kt timeout 0.0ms 0.0MB 0ms 0ms kotlin/native 1.6.21

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 461ms 8.2ms 362.9MB 450ms 80ms kotlin/jvm 17.0.2
java 1.java 489ms 6.8ms 286.1MB 513ms 60ms openjdk 18.0.1
java 1.java 491ms 9.7ms 288.9MB 507ms 63ms openjdk 19
java 1.java 870ms 1.9ms 365.7MB 693ms 97ms graal/jvm 17.0.3
java 1.java 952ms 3.7ms 751.8MB 610ms 470ms openjdk/zgc 18.0.1
kotlin 1.kt timeout 0.0ms 0.0MB 0ms 0ms kotlin/native 1.6.21

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 178ms 1.5ms 220.8MB 160ms 47ms kotlin/jvm 17.0.2
java 1.java 215ms 3.7ms 170.3MB 240ms 33ms openjdk 19
java 1.java 218ms 2.5ms 172.0MB 227ms 43ms openjdk 18.0.1
java 1.java 422ms 10.0ms 352.5MB 247ms 223ms openjdk/zgc 18.0.1
kotlin 1.kt 560ms 1.8ms 62.4MB 537ms 10ms kotlin/native 1.6.21
java 1.java 585ms 6.4ms 245.8MB 370ms 73ms graal/jvm 17.0.3

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 551ms 5.5ms 40.5MB 567ms 13ms openjdk 18.0.1
java 1.java 554ms 3.0ms 39.8MB 567ms 10ms openjdk 19
kotlin 1.kt 570ms 1.1ms 43.1MB 583ms 13ms kotlin/jvm 17.0.2
kotlin 1n.kt 583ms 1.1ms 1.1MB 570ms 0ms kotlin/native 1.6.21
java 1.java 602ms 0.9ms 40.9MB 573ms 53ms openjdk/zgc 18.0.1
java 1.java 856ms 5.8ms 83.0MB 570ms 23ms graal/jvm 17.0.3
java 2.java 1864ms 6.1ms 544.3MB 1893ms 117ms openjdk 19
java 2.java 1934ms 11ms 547.2MB 1927ms 157ms openjdk 18.0.1
java 2.java 2548ms 12ms 1221.8MB 1943ms 790ms openjdk/zgc 18.0.1

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1n.kt 61ms 0.3ms 1.1MB 50ms 0ms kotlin/native 1.6.21
kotlin 1.kt 134ms 4.0ms 43.2MB 143ms 17ms kotlin/jvm 17.0.2
java 1.java 135ms 3.2ms 40.6MB 147ms 17ms openjdk 18.0.1
java 1.java 136ms 2.9ms 41.5MB 147ms 17ms openjdk 19
java 1.java 188ms 6.9ms 38.4MB 160ms 53ms openjdk/zgc 18.0.1
java 2.java 410ms 4.1ms 337.4MB 470ms 83ms openjdk 19
java 2.java 418ms 12ms 322.7MB 483ms 73ms openjdk 18.0.1
java 1.java 452ms 2.8ms 88.4MB 170ms 23ms graal/jvm 17.0.3
java 2.java 668ms 2.0ms 471.8MB 523ms 297ms openjdk/zgc 18.0.1

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java timeout 0.0ms 0.0MB 0ms 0ms graal/jvm 17.0.3
java 1.java timeout 0.0ms 0.0MB 0ms 0ms openjdk 18.0.1
java 1.java timeout 0.0ms 0.0MB 0ms 0ms openjdk 19
java 1.java timeout 0.0ms 0.0MB 0ms 0ms openjdk/zgc 18.0.1
kotlin 1.kt timeout 0.0ms 0.0MB 0ms 0ms kotlin/jvm 17.0.2
kotlin 1n.kt timeout 0.0ms 0.0MB 0ms 0ms kotlin/native 1.6.21
kotlin 2n.kt timeout 0.0ms 0.0MB 0ms 0ms kotlin/native 1.6.21

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 1363ms 13ms 396.9MB 1753ms 97ms graal/jvm 17.0.3
kotlin 1.kt 1456ms 23ms 227.6MB 1820ms 50ms kotlin/jvm 17.0.2
java 1.java 1532ms 15ms 240.8MB 2047ms 80ms openjdk 19
java 1.java 1539ms 11ms 250.8MB 1873ms 60ms openjdk 18.0.1
java 1.java 1946ms 0.8ms 933.1MB 1893ms 633ms openjdk/zgc 18.0.1
kotlin 1n.kt timeout 0.0ms 0.0MB 0ms 0ms kotlin/native 1.6.21
kotlin 2n.kt timeout 0.0ms 0.0MB 0ms 0ms kotlin/native 1.6.21

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1.kt 4527ms 12ms 182.2MB 5443ms 70ms kotlin/jvm 17.0.2

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
kotlin 1-m.kt 1369ms 13ms 182.1MB 2103ms 53ms kotlin/jvm 17.0.2