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 09:12	3,149	65,662,865	33,623,000	1,018,000	2,387,968
2	Mar 30, 2026 09:09	3,151	62,832,716	34,664,000	0	2,277,376
3	Mar 30, 2026 09:16	3,151	63,280,960	33,641,000	1,019,000	2,277,376
4	Mar 30, 2026 09:11	3,152	59,191,151	34,670,000	0	2,277,376
5	Mar 30, 2026 09:10	3,153	65,425,494	34,686,000	0	2,277,376
6	Mar 30, 2026 09:14	3,154	66,950,180	33,679,000	1,020,000	2,277,376
7	Mar 30, 2026 09:20	3,165	58,859,459	34,817,000	0	2,277,376
8	Mar 30, 2026 09:20	3,166	60,537,560	34,826,000	0	2,408,448
9	Mar 30, 2026 09:16	3,167	71,245,140	32,850,000	1,990,000	2,396,160
10	Mar 30, 2026 09:17	3,167	63,189,664	34,832,000	0	2,404,352
11	Mar 30, 2026 09:19	3,167	63,870,660	33,842,000	995,000	2,277,376
12	Mar 30, 2026 09:09	3,168	61,978,310	32,858,000	1,991,000	2,277,376
13	Mar 30, 2026 09:16	3,168	61,768,603	33,856,000	995,000	2,277,376
14	Mar 30, 2026 09:18	3,168	60,649,493	32,852,000	1,991,000	2,277,376
15	Mar 30, 2026 09:13	3,168	65,419,680	33,858,000	995,000	2,281,472
16	Mar 30, 2026 09:19	3,168	58,401,301	32,859,000	1,991,000	2,400,256
17	Mar 30, 2026 09:21	3,168	59,649,152	33,852,000	995,000	2,404,352
18	Mar 30, 2026 09:19	3,168	59,640,607	33,849,000	995,000	2,404,352
19	Mar 30, 2026 09:11	3,168	67,528,653	34,850,000	0	2,400,256
20	Mar 30, 2026 09:20	3,168	60,708,748	33,856,000	995,000	2,396,160
21	Mar 30, 2026 09:14	3,169	60,942,890	32,863,000	1,991,000	2,277,376
22	Mar 30, 2026 09:14	3,169	63,662,332	33,867,000	996,000	2,400,256
23	Mar 30, 2026 09:14	3,169	59,246,839	33,861,000	995,000	2,400,256
24	Mar 30, 2026 09:13	3,169	65,600,651	32,863,000	1,991,000	2,277,376
25	Mar 30, 2026 09:14	3,169	58,920,416	32,871,000	1,992,000	2,277,376
26	Mar 30, 2026 09:19	3,169	62,524,589	33,863,000	995,000	2,387,968
27	Mar 30, 2026 09:18	3,169	60,129,525	32,867,000	1,991,000	2,396,160
28	Mar 30, 2026 09:13	3,169	62,792,425	33,868,000	996,000	2,277,376
29	Mar 30, 2026 09:18	3,170	60,913,983	32,875,000	1,992,000	2,277,376
30	Mar 30, 2026 09:18	3,171	59,317,768	32,891,000	1,993,000	2,277,376
31	Mar 30, 2026 09:17	3,171	62,821,112	33,885,000	996,000	2,277,376
32	Mar 30, 2026 09:18	3,171	60,421,901	33,882,000	996,000	2,277,376
33	Mar 30, 2026 09:21	3,171	58,892,761	32,891,000	1,993,000	2,400,256
34	Mar 30, 2026 09:21	3,171	59,396,914	32,892,000	1,993,000	2,277,376
35	Mar 30, 2026 09:09	3,173	57,909,720	32,907,000	1,994,000	2,277,376
36	Mar 30, 2026 09:19	3,173	55,563,319	32,906,000	1,994,000	2,510,848
37	Mar 30, 2026 09:12	3,173	61,541,678	33,904,000	997,000	2,400,256
38	Mar 30, 2026 09:18	3,175	62,160,809	32,929,000	1,995,000	2,400,256
39	Mar 30, 2026 09:13	3,176	62,438,603	33,938,000	998,000	2,277,376
40	Mar 30, 2026 09:15	3,176	58,161,504	33,933,000	998,000	2,392,064
41	Mar 30, 2026 09:13	3,177	62,433,457	33,954,000	998,000	2,400,256
42	Mar 30, 2026 09:13	3,177	57,749,502	33,950,000	998,000	2,277,376
43	Mar 30, 2026 09:19	3,177	64,452,780	33,948,000	998,000	2,400,256
44	Mar 30, 2026 09:11	3,177	63,483,127	33,948,000	998,000	2,396,160
45	Mar 30, 2026 09:11	3,178	63,583,453	33,964,000	998,000	2,277,376
46	Mar 30, 2026 09:17	3,180	55,816,878	32,981,000	1,998,000	2,277,376
47	Mar 30, 2026 09:16	3,181	57,454,643	33,990,000	999,000	2,277,376
48	Mar 30, 2026 09:10	3,181	66,307,810	33,993,000	999,000	2,277,376
49	Mar 30, 2026 09:11	3,182	60,272,868	34,006,000	1,000,000	2,400,256
50	Mar 30, 2026 09:10	3,183	63,392,407	33,017,000	2,001,000	2,277,376
51	Mar 30, 2026 09:14	3,184	55,330,791	33,028,000	2,001,000	2,277,376
52	Mar 30, 2026 09:15	3,184	63,039,277	34,029,000	1,000,000	2,387,968
53	Mar 30, 2026 09:11	3,184	56,587,729	34,026,000	1,000,000	2,277,376
54	Mar 30, 2026 09:15	3,187	58,940,523	33,051,000	2,003,000	2,277,376
55	Mar 30, 2026 09:16	3,189	58,035,140	34,077,000	1,002,000	2,396,160
56	Mar 30, 2026 09:16	3,191	55,593,728	33,093,000	2,005,000	2,269,184
57	Mar 30, 2026 09:12	3,196	59,363,120	33,150,000	2,009,000	2,277,376

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