Blue color from RGB

Extract the Blue channel from a stream of RGB pixels as fast as possible.

Input: 150 000 000 pixels in binary RGB format on STDIN (3 bytes per pixel: R, G, B).

Output: Write only the Blue byte of each pixel to STDOUT (150 000 000 bytes total).

Restrictions:30s256Mb 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.

Back to listApr 12, 2026 19:32

Josu San Martin

Score: 3,068

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Apr 12, 2026 20:00	3,049	69,469,101	27,798,000	14,892,000	151,339,008
2	Apr 12, 2026 19:29	3,053	63,360,357	27,830,000	14,909,000	151,334,912
3	Apr 12, 2026 19:29	3,053	65,690,153	27,834,000	14,911,000	151,433,216
4	Apr 12, 2026 19:32	3,055	70,097,071	27,853,000	14,921,000	151,437,312
5	Apr 12, 2026 19:29	3,059	66,160,978	27,889,000	14,940,000	151,433,216
6	Apr 12, 2026 20:00	3,059	67,518,438	27,886,000	14,939,000	151,330,816
7	Apr 12, 2026 20:00	3,060	67,088,615	28,896,000	13,950,000	151,433,216
8	Apr 12, 2026 19:32	3,060	62,759,001	27,900,000	14,946,000	151,433,216
9	Apr 12, 2026 19:32	3,060	66,010,930	27,900,000	14,946,000	151,433,216
10	Apr 12, 2026 19:32	3,060	66,468,462	27,899,000	14,946,000	151,416,832
11	Apr 12, 2026 20:00	3,060	64,424,792	27,900,000	14,946,000	151,433,216
12	Apr 12, 2026 19:32	3,061	65,203,506	27,902,000	14,947,000	151,334,912
13	Apr 12, 2026 19:32	3,063	66,168,067	27,919,000	14,956,000	151,433,216
14	Apr 12, 2026 19:29	3,064	63,643,465	29,928,000	12,969,000	151,334,912
15	Apr 12, 2026 20:00	3,066	69,274,067	28,946,000	13,974,000	151,334,912
16	Apr 12, 2026 19:29	3,068	65,200,767	27,971,000	14,984,000	151,334,912
17	Apr 12, 2026 20:00	3,068	63,367,040	28,968,000	13,984,000	151,425,024
18	Apr 12, 2026 19:29	3,070	64,764,309	27,991,000	14,995,000	151,334,912
19	Apr 12, 2026 19:32	3,073	64,802,584	29,015,000	14,007,000	151,429,120
20	Apr 12, 2026 19:29	3,073	66,971,310	29,018,000	14,009,000	151,334,912
21	Apr 12, 2026 20:00	3,073	63,162,410	29,012,000	14,006,000	151,433,216
22	Apr 12, 2026 20:00	3,073	69,383,840	29,015,000	14,007,000	151,334,912
23	Apr 12, 2026 19:29	3,074	65,577,071	30,022,000	13,009,000	151,334,912
24	Apr 12, 2026 19:29	3,076	64,903,279	29,047,000	14,022,000	151,429,120
25	Apr 12, 2026 19:29	3,076	75,822,210	29,043,000	14,020,000	151,433,216
26	Apr 12, 2026 19:29	3,077	60,821,142	29,049,000	14,023,000	151,433,216
27	Apr 12, 2026 19:29	3,078	63,061,238	29,060,000	14,029,000	151,343,104
28	Apr 12, 2026 19:32	3,079	68,849,308	29,067,000	14,032,000	151,339,008
29	Apr 12, 2026 19:32	3,080	66,177,224	29,084,000	14,040,000	151,433,216
30	Apr 12, 2026 19:32	3,086	68,368,829	29,134,000	14,064,000	151,433,216
31	Apr 12, 2026 19:32	3,086	66,944,876	29,141,000	14,068,000	151,433,216
32	Apr 12, 2026 20:00	3,163	69,914,553	30,195,000	14,091,000	151,429,120
33	Apr 12, 2026 19:32	3,196	77,431,773	29,833,000	14,916,000	151,334,912

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