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	Jun 12, 2024 13:42	59,200	355,217,262	290,081,167	0	2,285,568
2	Jun 12, 2024 13:42	59,216	359,734,130	290,158,485	0	2,281,472
3	Jun 12, 2024 13:44	59,219	348,937,322	290,175,382	0	2,277,376
4	Jun 12, 2024 13:44	59,239	366,060,276	290,272,779	0	2,289,664
5	Jun 12, 2024 13:44	59,243	348,760,427	290,289,578	0	2,285,568
6	Jun 12, 2024 13:42	59,298	346,583,122	290,558,774	0	2,281,472
7	Jun 12, 2024 13:42	59,489	317,683,565	290,495,000	1,001,000	2,293,760
8	Jun 12, 2024 13:44	59,517	319,793,024	289,634,000	1,997,000	2,428,928
9	Jun 12, 2024 13:44	59,519	315,837,270	288,648,000	2,996,000	2,293,760
10	Jun 12, 2024 13:42	59,528	319,086,294	289,688,000	1,997,000	2,293,760
11	Jun 12, 2024 13:44	59,529	321,465,399	289,695,000	1,997,000	2,293,760
12	Jun 12, 2024 13:42	59,534	319,020,274	288,718,000	2,997,000	2,420,736
13	Jun 12, 2024 13:42	59,555	317,062,240	289,821,000	1,998,000	2,437,120
14	Jun 12, 2024 13:44	59,607	319,425,400	290,073,000	2,000,000	2,293,760
15	Jun 12, 2024 13:42	59,611	363,742,097	292,094,861	0	2,277,376
16	Jun 12, 2024 13:42	59,764	321,771,662	289,844,000	2,998,000	2,293,760
17	Jun 12, 2024 13:44	59,784	317,721,601	289,945,000	2,999,000	2,420,736
18	Jun 12, 2024 13:42	59,787	316,991,789	289,957,000	2,999,000	2,293,760
19	Jun 12, 2024 13:42	59,787	314,774,537	289,956,000	2,999,000	2,293,760
20	Jun 12, 2024 13:42	59,797	318,682,742	291,004,000	2,000,000	2,424,832
21	Jun 12, 2024 13:42	59,807	323,334,545	290,056,000	3,000,000	2,441,216
22	Jun 12, 2024 13:42	59,817	315,872,783	291,105,000	2,000,000	2,293,760
23	Jun 12, 2024 13:42	59,848	315,494,857	291,253,000	2,001,000	2,412,544
24	Jun 12, 2024 13:42	59,867	316,786,191	291,345,000	2,002,000	2,293,760
25	Jun 12, 2024 13:44	59,957	319,010,644	290,794,000	2,997,000	2,293,760
26	Jun 12, 2024 13:44	59,999	319,027,014	290,994,000	2,999,000	2,293,760
27	Jun 12, 2024 13:44	60,005	315,258,848	291,025,000	3,000,000	2,293,760
28	Jun 12, 2024 13:42	60,008	320,536,331	292,040,000	2,000,000	2,293,760
29	Jun 12, 2024 13:42	60,018	324,510,734	292,086,000	2,000,000	2,420,736
30	Jun 12, 2024 13:44	60,019	319,758,578	291,092,000	3,000,000	2,428,928
31	Jun 12, 2024 13:42	60,038	322,591,971	291,184,000	3,001,000	2,523,136
32	Jun 12, 2024 13:42	60,659	356,812,958	297,228,318	0	2,289,664
33	Jun 12, 2024 13:42	60,840	360,037,984	298,116,647	0	2,281,472
34	Jun 12, 2024 13:42	61,487	323,574,475	299,283,000	2,001,000	2,420,736
35	Jun 12, 2024 13:42	62,245	330,654,790	303,000,000	2,000,000	2,420,736
36	Jun 12, 2024 13:42	78,998	413,424,467	384,090,000	3,000,000	2,293,760

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