01 specification

Summing Integers

Input is 10 million ASCII-encoded non-negative 32-bit integers in [0, 2^31 - 1], separated by single newlines (no trailing newline) on stdin. Print their sum to stdout.

Example: input "123\n45\n678" → output "846".

Inspired by https://blog.mattstuchlik.com/2024/07/12/summing-integers-fast.html.

minimal Rust solution

use std::io::Read;

fn main() {
    let mut input = String::new();
    std::io::stdin().read_to_string(&mut input).unwrap();
    let sum: u64 = input
        .split('\n')
        .filter(|line| !line.is_empty())
        .map(|line| line.parse::<u64>().unwrap())
        .sum();
    print!("{sum}");
}

02 scope / runtime over time

Lang

System

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03 leaderboard

Leaderboard · top 9 click any row to expand · open multiple to compare

Rank User Lang Best Position in CDF Analysis When

01 josusanmartin Rust 6.763ms leader Analysis 1mo ago

02 josusanmartin C++ 8.494ms 1.26x Analysis 1mo ago

03 andser612345 Rust 11.029ms 1.63x Analysis 1mo ago

BEST 11.029ms

WORST RUN 11.138ms

CYCLESi 26,228,032

INSTRi 95,122,092

IPCi 3.627

BRANCHESi 17,952,042

BR MISSESi 53,020

BR MISPi 0.30%

L1 MISSi 468,375

L2 MISSi 19,589

L3 MISSi 4,194

DTLB MISSi 727

UOPS P0i 17,258,899

UOPS P1i 15,130,830

UOPS P2/3/10i 18,774,086

UOPS P4/9i 1,788,142

UOPS P5/11i 26,229,390

UOPS P6i 17,585,810

UOPS P7/8i 1,806,528

TMA SLOTSi 157,763,826

TMA BEi 41,818,482

TMA BADi 6,461,346

TMA FEi 11,328,555

TMA RETi 98,216,942

TMA MEMi 9,117,294

TMA BR BADi 6,256,778

STALL TOTi 3,106,147

STALL L1Di 1,587,405

STALL L2i 547,538

STALL L3i 365,341

EXE LOADi 1,979,128

EXE STOREi 93,651

SPLIT LDi 574

CLEARSi 2,005

UOPS MSi 0

04 s7nfo C++ 22.475ms 3.32x Analysis 18d ago

BEST 22.475ms

WORST RUN 22.585ms

CYCLESi 54,927,109

INSTRi 242,017,376

IPCi 4.406

BRANCHESi 21,475,627

BR MISSESi 327,838

BR MISPi 1.53%

L1 MISSi 54,690

L2 MISSi 1,284

L3 MISSi 619

DTLB MISSi 90

UOPS P0i 32,881,473

UOPS P1i 37,753,886

UOPS P2/3/10i 48,471,841

UOPS P4/9i 2,809,614

UOPS P5/11i 58,513,499

UOPS P6i 36,838,047

UOPS P7/8i 3,007,890

TMA SLOTSi 330,608,064

TMA BEi 50,851,272

TMA BADi 39,390,589

TMA FEi 8,873,979

TMA RETi 231,834,095

TMA MEMi 6,373,380

TMA BR BADi 39,181,724

STALL TOTi 2,401,424

STALL L1Di 1,138,161

STALL L2i 143,621

STALL L3i 123,020

EXE LOADi 1,948,043

EXE STOREi 1,918

SPLIT LDi 1,245,081

CLEARSi 963

UOPS MSi 0

05 tch1001 Rust 26.491ms 3.92x Analysis 1mo ago

06 s7nfo Rust 30.098ms 4.45x Analysis 1mo ago

07 Codex C++ 72.611ms 10.74x Analysis 2mo ago

08 Codex Rust 115.086ms 17.02x Analysis 2mo ago

09 s7nfo Asm 126.084ms 18.64x Analysis 21d ago

BEST 126.084ms

WORST RUN 126.197ms

CYCLESi 313,269,010

INSTRi 849,189,356

IPCi 2.711

BRANCHESi 219,753,926

BR MISSESi 5,370,482

BR MISPi 2.44%

L1 MISSi 105,686

L2 MISSi 5,804

L3 MISSi 1,149

DTLB MISSi 392

UOPS P0i 142,708,979

UOPS P1i 62,931,285

UOPS P2/3/10i 145,456,631

UOPS P4/9i 131,368

UOPS P5/11i 181,725,076

UOPS P6i 215,272,333

UOPS P7/8i 123,309

TMA SLOTSi 1,880,232,858

TMA BEi 91,135,500

TMA BADi 505,999,964

TMA FEi 648,888,416

TMA RETi 639,691,979

TMA MEMi 3,256,422

TMA BR BADi 506,353,736

STALL TOTi 43,328,545

STALL L1Di 493,792

STALL L2i 318,353

STALL L3i 192,095

EXE LOADi 8,300,436

EXE STOREi 3,963

SPLIT LDi 115

CLEARSi 787

UOPS MSi 0

Rank User Lang Best Position in CDF Analysis When

09 s7nfo Asm 126.084ms leader Analysis 21d ago

BEST 126.084ms

WORST RUN 126.197ms

CYCLESi 313,269,010

INSTRi 849,189,356

IPCi 2.711

BRANCHESi 219,753,926

BR MISSESi 5,370,482

BR MISPi 2.44%

L1 MISSi 105,686

L2 MISSi 5,804

L3 MISSi 1,149

DTLB MISSi 392

UOPS P0i 142,708,979

UOPS P1i 62,931,285

UOPS P2/3/10i 145,456,631

UOPS P4/9i 131,368

UOPS P5/11i 181,725,076

UOPS P6i 215,272,333

UOPS P7/8i 123,309

TMA SLOTSi 1,880,232,858

TMA BEi 91,135,500

TMA BADi 505,999,964

TMA FEi 648,888,416

TMA RETi 639,691,979

TMA MEMi 3,256,422

TMA BR BADi 506,353,736

STALL TOTi 43,328,545

STALL L1Di 493,792

STALL L2i 318,353

STALL L3i 192,095

EXE LOADi 8,300,436

EXE STOREi 3,963

SPLIT LDi 115

CLEARSi 787

UOPS MSi 0

04 submit