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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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Sep 30, 2022 03:24	68,281	395,130,848	334,575,001	0	2,273,280
2	Sep 22, 2022 17:51	68,285	394,640,267	334,595,604	0	2,269,184
3	Sep 30, 2022 03:24	68,359	411,633,466	334,961,347	0	2,273,280
4	Sep 22, 2022 17:49	68,370	404,483,843	335,014,092	0	2,269,184
5	Sep 22, 2022 17:49	68,374	417,475,985	335,033,366	0	2,265,088
6	Sep 22, 2022 17:51	68,385	405,054,911	335,085,589	0	2,273,280
7	Sep 30, 2022 03:24	68,400	412,952,012	335,158,229	0	2,260,992
8	Sep 22, 2022 17:49	68,419	405,524,537	335,255,259	0	2,273,280
9	Sep 22, 2022 17:51	71,137	378,945,045	346,574,000	1,997,000	2,404,352
10	Sep 22, 2022 17:49	71,173	370,670,954	347,749,000	999,000	2,281,472
11	Sep 22, 2022 17:49	71,184	373,527,773	346,805,000	1,998,000	2,519,040
12	Sep 22, 2022 17:51	71,187	371,410,131	346,820,000	1,998,000	2,396,160
13	Sep 22, 2022 17:49	71,193	373,179,252	346,847,000	1,999,000	2,404,352
14	Sep 30, 2022 03:24	71,193	374,655,601	347,845,000	999,000	2,281,472
15	Sep 30, 2022 03:24	71,196	374,661,367	347,861,000	999,000	2,396,160
16	Sep 30, 2022 03:24	71,196	370,799,058	348,861,000	0	2,281,472
17	Sep 30, 2022 03:24	71,202	370,370,629	347,889,000	999,000	2,400,256
18	Sep 22, 2022 17:49	71,204	371,113,453	346,902,000	1,999,000	2,281,472
19	Sep 22, 2022 17:51	71,206	374,111,305	347,908,000	999,000	2,281,472
20	Sep 30, 2022 03:24	71,208	371,071,964	347,918,000	999,000	2,400,256
21	Sep 22, 2022 17:49	71,209	373,707,780	348,924,000	0	2,281,472
22	Sep 22, 2022 17:49	71,212	377,442,481	347,939,000	999,000	2,281,472
23	Sep 22, 2022 17:49	71,212	374,833,966	347,938,000	999,000	2,281,472
24	Sep 22, 2022 17:51	71,235	369,549,457	347,051,000	2,000,000	2,404,352
25	Sep 22, 2022 17:51	71,242	373,054,389	347,084,000	2,000,000	2,400,256
26	Sep 30, 2022 03:24	71,243	371,717,137	347,093,000	2,000,000	2,281,472
27	Sep 30, 2022 03:24	71,250	374,730,041	347,127,000	2,000,000	2,281,472
28	Sep 22, 2022 17:51	71,279	376,040,013	349,268,000	0	2,281,472
29	Sep 30, 2022 03:24	71,280	379,117,480	349,270,000	0	2,400,256
30	Sep 22, 2022 17:51	71,292	375,369,006	348,333,000	1,000,000	2,281,472
31	Sep 30, 2022 03:24	71,299	384,756,375	349,363,000	0	2,281,472
32	Sep 22, 2022 17:49	71,300	377,330,352	348,368,000	1,001,000	2,281,472
33	Sep 22, 2022 17:49	71,306	377,988,399	348,399,000	1,001,000	2,281,472
34	Sep 22, 2022 17:51	71,317	375,792,597	348,453,000	1,001,000	2,281,472
35	Sep 22, 2022 17:51	71,348	376,968,479	348,608,000	998,000	2,281,472
36	Sep 22, 2022 17:51	72,958	435,745,078	357,491,951	0	2,260,992

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