Parse JSON

Compute the total amount of non-canceled external USD transactions from a stream of JSON records as fast as possible.

Input: 1 000 000 JSON records on STDIN, one per line. Each record has the following structure:

{
    "user_id": 0,
    "currency": "USD",
    "transactions": [
        {
            "amount": 0,
            "to_user_id": 0,
            "canceled": false
        }
    ]
}

Field	Constraints
`user_id`	Integer, max 10 000
`currency`	One of `"GBP"`, `"USD"`, `"RUB"`, `"JPY"`, `"CHF"`
`transactions`	Array, max 10 elements
`amount`	Integer, max 1000
`canceled`	Boolean; may be omitted when `false`

Field order is not guaranteed within any object.

Output: The total amount of all transactions where:

record.currency == "USD"
transaction.to_user_id != record.user_id (external)
transaction.canceled is false or absent

Restrictions:60s512Mb 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	Mar 30, 2026 05:38	3,149	59,849,986	34,637,000	0	2,277,376
2	Mar 30, 2026 05:34	3,151	61,239,196	34,659,000	0	2,510,848
3	Mar 30, 2026 05:52	3,156	66,054,344	33,692,000	1,020,000	2,277,376
4	Mar 30, 2026 05:45	3,156	63,172,918	34,714,000	0	2,392,064
5	Mar 30, 2026 05:35	3,158	59,914,824	32,756,000	1,985,000	2,400,256
6	Mar 30, 2026 05:41	3,159	59,621,066	33,729,000	1,022,000	2,400,256
7	Mar 30, 2026 05:50	3,164	63,869,209	32,814,000	1,988,000	2,277,376
8	Mar 30, 2026 05:44	3,166	65,857,793	33,833,000	995,000	2,277,376
9	Mar 30, 2026 05:47	3,166	65,814,100	33,828,000	994,000	2,277,376
10	Mar 30, 2026 05:33	3,167	62,037,401	33,846,000	995,000	2,400,256
11	Mar 30, 2026 05:49	3,167	59,727,609	33,846,000	995,000	2,277,376
12	Mar 30, 2026 05:36	3,167	65,007,689	32,846,000	1,990,000	2,392,064
13	Mar 30, 2026 05:47	3,168	65,455,413	33,852,000	995,000	2,277,376
14	Mar 30, 2026 05:45	3,168	59,583,430	32,854,000	1,991,000	2,396,160
15	Mar 30, 2026 05:51	3,168	62,450,235	32,861,000	1,991,000	2,396,160
16	Mar 30, 2026 05:40	3,168	59,798,271	33,856,000	995,000	2,400,256
17	Mar 30, 2026 05:40	3,168	67,083,621	33,853,000	995,000	2,277,376
18	Mar 30, 2026 05:49	3,168	60,470,163	32,856,000	1,991,000	2,478,080
19	Mar 30, 2026 05:43	3,168	64,684,860	34,847,000	0	2,277,376
20	Mar 30, 2026 05:40	3,168	61,445,710	33,853,000	995,000	2,277,376
21	Mar 30, 2026 05:43	3,168	60,179,103	33,856,000	995,000	2,392,064
22	Mar 30, 2026 05:38	3,168	63,899,036	34,848,000	0	2,510,848
23	Mar 30, 2026 05:34	3,168	61,143,852	32,854,000	1,991,000	2,277,376
24	Mar 30, 2026 05:43	3,168	60,568,036	32,862,000	1,991,000	2,404,352
25	Mar 30, 2026 05:49	3,169	66,911,340	32,869,000	1,992,000	2,277,376
26	Mar 30, 2026 05:33	3,169	60,618,313	32,866,000	1,991,000	2,277,376
27	Mar 30, 2026 05:45	3,169	58,966,148	33,864,000	996,000	2,404,352
28	Mar 30, 2026 05:51	3,169	59,574,967	33,861,000	995,000	2,277,376
29	Mar 30, 2026 05:38	3,170	63,851,025	32,878,000	1,992,000	2,392,064
30	Mar 30, 2026 05:35	3,170	62,156,425	34,870,000	0	2,387,968
31	Mar 30, 2026 05:35	3,170	62,056,004	33,873,000	996,000	2,277,376
32	Mar 30, 2026 05:50	3,172	57,025,454	32,902,000	1,994,000	2,277,376
33	Mar 30, 2026 05:52	3,172	58,320,758	33,898,000	997,000	2,277,376
34	Mar 30, 2026 05:40	3,174	60,069,394	33,921,000	997,000	2,281,472
35	Mar 30, 2026 05:47	3,174	62,181,785	32,919,000	1,995,000	2,277,376
36	Mar 30, 2026 05:33	3,174	59,757,516	32,924,000	1,995,000	2,404,352
37	Mar 30, 2026 05:51	3,175	64,037,424	33,926,000	997,000	2,277,376
38	Mar 30, 2026 05:51	3,175	58,945,986	32,931,000	1,995,000	2,277,376
39	Mar 30, 2026 05:36	3,177	63,860,957	33,944,000	998,000	2,277,376
40	Mar 30, 2026 05:34	3,177	56,175,966	33,952,000	998,000	2,277,376
41	Mar 30, 2026 05:52	3,178	56,696,285	32,962,000	1,997,000	2,277,376
42	Mar 30, 2026 05:40	3,179	55,591,272	33,967,000	999,000	2,510,848
43	Mar 30, 2026 05:36	3,179	58,177,388	32,970,000	1,998,000	2,478,080
44	Mar 30, 2026 05:35	3,179	59,720,041	33,974,000	999,000	2,400,256
45	Mar 30, 2026 05:42	3,182	58,896,262	34,004,000	1,000,000	2,396,160
46	Mar 30, 2026 05:41	3,182	57,790,705	34,003,000	1,000,000	2,396,160
47	Mar 30, 2026 05:51	3,184	58,156,918	34,020,000	1,000,000	2,273,280
48	Mar 30, 2026 05:35	3,184	61,560,949	33,028,000	2,001,000	2,277,376
49	Mar 30, 2026 05:41	3,185	58,030,721	33,029,000	2,001,000	2,277,376
50	Mar 30, 2026 05:51	3,185	61,166,779	33,031,000	2,001,000	2,273,280
51	Mar 30, 2026 05:42	3,186	62,213,598	34,048,000	1,001,000	2,277,376
52	Mar 30, 2026 05:50	3,186	57,484,472	34,045,000	1,001,000	2,277,376
53	Mar 30, 2026 05:40	3,187	58,148,168	33,052,000	2,003,000	2,400,256
54	Mar 30, 2026 05:35	3,188	57,064,391	35,064,000	0	2,396,160
55	Mar 30, 2026 05:44	3,189	60,895,526	33,080,000	2,004,000	2,277,376
56	Mar 30, 2026 05:42	3,192	65,129,656	33,104,000	2,006,000	2,277,376
57	Mar 30, 2026 05:44	3,193	60,472,478	34,123,000	1,003,000	2,277,376

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