Format integers

Compute a checksum over the decimal representations of binary integers as fast as possible.

Input: 250 000 000 uint32 values in little-endian binary on STDIN (4 bytes each).

Output: A uint64 checksum computed as:

CRC = sum of number_crc(n) for each n

where number_crc(n) converts n to its decimal string and sums ascii(digit) * position over each digit (0-indexed from the left).

Example: For n = 42, the decimal string is "42", so number_crc(42) = ascii('4') * 0 + ascii('2') * 1 = 52 * 0 + 50 * 1 = 50.

Restrictions:60s256Mb 1 Score Packages

Feel free to create an issue if you need an extra library from the standard Ubuntu repository.

Name	Version	Description
libc6-dev	2.39-0ubuntu8.7	GNU C Library: Development Libraries and Header Files Contains the symlinks, headers, and object files needed to compile and link programs which use the standard C library.
libclang-common-14-dev	1:14.0.6-19build4	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-15-dev	1:15.0.7-14build3	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-16-dev	1:16.0.6-23ubuntu4	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-17-dev	1:17.0.6-9ubuntu1	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-18-dev	1:18.1.3-1ubuntu1	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-19-dev	1:19.1.1-1ubuntu1~24.04.2	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-20-dev	1:20.1.2-0ubuntu1~24.04.2	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libcrypt-dev	1:4.4.36-4build1	libcrypt development files This package contains the files needed for developing applications that use libcrypt.
libgcc-10-dev	10.5.0-4ubuntu2.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-11-dev	11.5.0-1ubuntu1~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-12-dev	12.4.0-2ubuntu1~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-13-dev	13.3.0-6ubuntu2~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-14-dev	14.2.0-4ubuntu2~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libobjc-13-dev	13.3.0-6ubuntu2~24.04.1	Runtime library for GNU Objective-C applications (development files) This package contains the headers and static library files needed to build GNU ObjC applications.
libssl-dev	3.0.13-0ubuntu3.9	Secure Sockets Layer toolkit - development files This package is part of the OpenSSL project's implementation of the SSL and TLS cryptographic protocols for secure communication over the Internet. . It contains development libraries, header files, and manpages for libssl and libcrypto.
libstdc++-10-dev	10.5.0-4ubuntu2.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-11-dev	11.5.0-1ubuntu1~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-12-dev	12.4.0-2ubuntu1~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-13-dev	13.3.0-6ubuntu2~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-14-dev	14.2.0-4ubuntu2~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libtbb-dev	2021.11.0-2ubuntu2	parallelism library for C++ - development files TBB is a library that helps you leverage multi-core processor performance without having to be a threading expert. It represents a higher-level, task-based parallelism that abstracts platform details and threading mechanism for performance and scalability. . (Note: if you are a user of the i386 architecture, i.e., 32-bit Intel or compatible hardware, this package only supports Pentium4-compatible and higher processors.) . This package includes the TBB development files.

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Robert BurkeScore: 55,374Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Oct 4, 2022 15:39	52,920	319,581,519	259,310,292	0	2,183,168
2	Oct 4, 2022 15:39	52,922	319,279,498	259,315,642	0	2,174,976
3	Oct 4, 2022 15:39	52,931	325,403,945	259,362,713	0	2,183,168
4	Oct 4, 2022 15:38	52,947	329,261,407	259,439,947	0	2,179,072
5	Oct 4, 2022 15:38	52,967	332,933,064	259,536,499	0	2,174,976
6	Oct 4, 2022 15:40	52,967	321,810,712	259,540,662	0	2,187,264
7	Oct 4, 2022 15:38	52,980	328,991,614	259,602,845	0	2,183,168
8	Oct 4, 2022 15:40	52,983	334,813,464	259,616,589	0	2,183,168
9	Oct 4, 2022 15:40	53,467	317,608,075	261,989,028	0	2,179,072
10	Oct 4, 2022 15:39	55,347	290,885,997	270,198,000	1,000,000	2,441,216
11	Oct 4, 2022 15:38	55,353	294,328,910	270,231,000	1,000,000	2,281,472
12	Oct 4, 2022 15:39	55,355	290,862,365	270,240,000	1,000,000	2,441,216
13	Oct 4, 2022 15:40	55,361	294,451,765	270,268,000	1,000,000	2,441,216
14	Oct 4, 2022 15:39	55,363	293,932,954	270,279,000	1,001,000	2,281,472
15	Oct 4, 2022 15:38	55,366	293,106,163	270,290,000	1,001,000	2,281,472
16	Oct 4, 2022 15:40	55,368	294,421,559	270,301,000	1,001,000	2,281,472
17	Oct 4, 2022 15:40	55,372	291,080,082	270,320,000	1,001,000	2,281,472
18	Oct 4, 2022 15:40	55,374	291,292,914	271,331,000	0	2,281,472
19	Oct 4, 2022 15:39	55,374	294,234,109	270,331,000	1,001,000	2,441,216
20	Oct 4, 2022 15:38	55,375	299,063,770	270,335,000	1,001,000	2,281,472
21	Oct 4, 2022 15:38	55,379	297,992,535	270,355,000	1,001,000	2,445,312
22	Oct 4, 2022 15:39	55,414	297,875,780	269,535,000	1,996,000	2,281,472
23	Oct 4, 2022 15:40	55,444	300,182,685	269,680,000	1,997,000	2,281,472
24	Oct 4, 2022 15:38	55,557	295,103,399	271,231,000	1,000,000	2,445,312
25	Oct 4, 2022 15:39	55,577	296,242,667	271,327,000	1,001,000	2,441,216
26	Oct 4, 2022 15:38	55,723	294,009,235	271,041,000	2,000,000	2,281,472
27	Oct 4, 2022 15:38	55,812	300,190,208	272,478,000	1,001,000	2,281,472
28	Oct 4, 2022 15:39	55,821	297,296,986	272,521,000	1,001,000	2,281,472
29	Oct 4, 2022 15:39	55,829	300,845,039	271,568,000	1,996,000	2,281,472
30	Oct 4, 2022 15:40	55,849	305,027,476	271,661,000	1,997,000	2,449,408
31	Oct 4, 2022 15:38	55,851	298,962,855	271,674,000	1,997,000	2,281,472
32	Oct 4, 2022 15:40	55,862	296,294,638	271,727,000	1,997,000	2,441,216
33	Oct 4, 2022 15:39	55,900	301,202,022	271,913,000	1,999,000	2,281,472
34	Oct 4, 2022 15:38	56,781	299,822,149	277,228,000	1,000,000	2,445,312
35	Oct 4, 2022 15:40	379,719	10,112,717,566	392,093,000	1,468,532,000	266,711,040
36	Oct 4, 2022 15:40	382,155	10,136,926,479	393,493,000	1,479,066,000	266,772,480

Model	Intel(R) Xeon(R) CPU E3-1271 v3 @ 3.60GHz
Cores	1