Elixir VS Rust benchmarks

Current benchmark data was generated on Sun Sep 27 2026, full log can be found HERE

CONTRIBUTIONS are WELCOME!

CPU INFO:[x86_64][4 cores] Intel(R) Core(TM) i7-3687U CPU @ 2.10GHz (Model 58)

* -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.)

show numbers without parallelization

show numbers with parallelization

coro-prime-sieve

Input: 4000

lang	code	time	stddev	peak-mem mem	time(user)	time(sys)	compiler compiler/runtime
rust	5-m.rs	776ms	8.2ms	5.2MB	2963ms	60ms	rustc 1.98.1
rust	3-m.rs	1159ms	98ms	8.8MB	4437ms	87ms	rustc 1.98.1
rust	1-m.rs	1841ms	27ms	8.6MB	6870ms	303ms	rustc 1.98.1
rust	3.rs	2252ms	19ms	9.1MB	2177ms	60ms	rustc 1.98.1
rust	4.rs	3680ms	17ms	7.3MB	3663ms	3ms	rustc 1.98.1
elixir	1.ex	5705ms	28ms	95.3MB	6130ms	317ms	elixir 15.2.7

Input: 1000

lang	code	time	stddev	peak-mem mem	time(user)	time(sys)	compiler compiler/runtime
rust	5-m.rs	80ms	20ms	3.2MB	270ms	0ms	rustc 1.98.1
rust	3-m.rs	81ms	11ms	5.8MB	260ms	10ms	rustc 1.98.1
rust	3.rs	128ms	4.2ms	3.9MB	113ms	0ms	rustc 1.98.1
rust	1-m.rs	128ms	3.9ms	5.5MB	437ms	23ms	rustc 1.98.1
rust	4.rs	243ms	10ms	3.3MB	233ms	0ms	rustc 1.98.1
elixir	1.ex	687ms	26ms	91.2MB	853ms	163ms	elixir 15.2.7

edigits

Input: 250001

lang	code	time	stddev	peak-mem mem	time(user)	time(sys)	compiler compiler/runtime
rust	2.rs	195ms	1.6ms	4.4MB	183ms	0ms	rustc 1.98.1
rust	1.rs	203ms	29ms	3.6MB	197ms	0ms	rustc 1.98.1
elixir	1.ex	timeout (120s)	—	—	—	—	elixir 15.2.7

Input: 100000

lang	code	time	stddev	peak-mem mem	time(user)	time(sys)	compiler compiler/runtime
rust	1.rs	52ms	2.2ms	2.8MB	40ms	0ms	rustc 1.98.1
rust	2.rs	54ms	4.2ms	3.4MB	43ms	0ms	rustc 1.98.1
elixir	1.ex	18934ms	249ms	89.8MB	19680ms	660ms	elixir 15.2.7

helloworld

Input: QwQ

lang	code	time	stddev	peak-mem mem	time(user)	time(sys)	compiler compiler/runtime
rust	1.rs	1.6ms	0.3ms	1.9MB	0ms	0ms	rustc 1.98.1
elixir	1.ex	313ms	17ms	86.7MB	366ms	88ms	elixir 15.2.7

pidigits

Input: 8000

lang	code	time	stddev	peak-mem mem	time(user)	time(sys)	compiler compiler/runtime
rust	2.rs	2314ms	44ms	2.8MB	2230ms	70ms	rustc 1.98.1
elixir	1.ex	2709ms	78ms	89.2MB	3030ms	930ms	elixir 15.2.7
rust	1.rs	10361ms	53ms	3.3MB	8747ms	1587ms	rustc 1.98.1

Input: 4000

lang	code	time	stddev	peak-mem mem	time(user)	time(sys)	compiler compiler/runtime
rust	2.rs	506ms	4.3ms	2.5MB	493ms	0ms	rustc 1.98.1
elixir	1-m.ex	962ms	17ms	87.7MB	1167ms	357ms	elixir 15.2.7
rust	1.rs	1997ms	8.8ms	2.8MB	1823ms	157ms	rustc 1.98.1

spectral-norm

Input: 8000

lang	code	time	stddev	peak-mem mem	time(user)	time(sys)	compiler compiler/runtime
rust	7-m.rs	3024ms	23ms	2.2MB	11890ms	10ms	rustc 1.98.1
rust	7.rs	5535ms	8.5ms	1.1MB	5527ms	0ms	rustc 1.98.1
rust	2-m.rs	5819ms	1.9ms	2.4MB	22997ms	13ms	rustc 1.98.1
rust	2.rs	11036ms	18ms	2.1MB	11023ms	0ms	rustc 1.98.1
elixir	1.ex	157109ms	510ms	95.5MB	157083ms	160ms	elixir 15.2.7

Input: 4000

lang	code	time	stddev	peak-mem mem	time(user)	time(sys)	compiler compiler/runtime
rust	7-m.rs	747ms	2.9ms	1.1MB	2903ms	7ms	rustc 1.98.1
rust	7.rs	1386ms	2.3ms	1.1MB	1377ms	0ms	rustc 1.98.1
rust	2-m.rs	1459ms	0.7ms	3.1MB	5733ms	3ms	rustc 1.98.1
rust	2.rs	2762ms	2.0ms	1.1MB	2750ms	0ms	rustc 1.98.1
elixir	1.ex	38614ms	362ms	99.3MB	38603ms	207ms	elixir 15.2.7

Input: 2000

lang	code	time	stddev	peak-mem mem	time(user)	time(sys)	compiler compiler/runtime
rust	7-m.rs	189ms	0.4ms	3.1MB	697ms	3ms	rustc 1.98.1
rust	7.rs	351ms	1.2ms	1.1MB	340ms	0ms	rustc 1.98.1
rust	2-m.rs	368ms	0.3ms	1.2MB	1410ms	3ms	rustc 1.98.1
rust	2.rs	693ms	2.4ms	1.1MB	680ms	0ms	rustc 1.98.1
elixir	1.ex	9814ms	27ms	90.8MB	9833ms	120ms	elixir 15.2.7