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 16:40	3,152	62,268,310	33,652,000	1,019,000	2,392,064
2	Mar 30, 2026 16:51	3,152	62,094,707	33,650,000	1,019,000	2,400,256
3	Mar 30, 2026 16:45	3,153	59,822,254	33,662,000	1,020,000	2,277,376
4	Mar 30, 2026 16:47	3,153	62,411,326	33,666,000	1,020,000	2,277,376
5	Mar 30, 2026 16:42	3,153	63,571,699	33,660,000	1,020,000	2,396,160
6	Mar 30, 2026 16:53	3,154	60,258,537	34,689,000	0	2,277,376
7	Mar 30, 2026 16:47	3,154	65,985,077	33,677,000	1,020,000	2,277,376
8	Mar 30, 2026 16:40	3,154	65,513,862	34,694,000	0	2,277,376
9	Mar 30, 2026 16:51	3,154	63,641,601	34,694,000	0	2,277,376
10	Mar 30, 2026 16:39	3,163	59,138,238	32,803,000	1,988,000	2,396,160
11	Mar 30, 2026 16:47	3,164	61,743,575	33,808,000	994,000	2,400,256
12	Mar 30, 2026 16:50	3,164	64,275,269	32,820,000	1,989,000	2,277,376
13	Mar 30, 2026 16:43	3,165	64,269,926	33,825,000	994,000	2,277,376
14	Mar 30, 2026 16:38	3,166	58,522,194	33,834,000	995,000	2,277,376
15	Mar 30, 2026 16:39	3,167	63,443,625	32,843,000	1,990,000	2,277,376
16	Mar 30, 2026 16:39	3,167	62,028,569	33,837,000	995,000	2,277,376
17	Mar 30, 2026 16:43	3,167	59,702,797	33,841,000	995,000	2,277,376
18	Mar 30, 2026 16:44	3,167	64,536,349	33,840,000	995,000	2,400,256
19	Mar 30, 2026 16:44	3,167	59,957,459	32,848,000	1,990,000	2,396,160
20	Mar 30, 2026 16:46	3,167	64,601,869	33,847,000	995,000	2,277,376
21	Mar 30, 2026 16:49	3,168	59,086,684	32,862,000	1,991,000	2,277,376
22	Mar 30, 2026 16:51	3,168	60,604,069	33,854,000	995,000	2,277,376
23	Mar 30, 2026 16:48	3,168	64,789,762	32,861,000	1,991,000	2,277,376
24	Mar 30, 2026 16:48	3,168	61,396,279	33,851,000	995,000	2,273,280
25	Mar 30, 2026 16:51	3,168	64,182,859	33,858,000	995,000	2,396,160
26	Mar 30, 2026 16:52	3,168	64,535,412	33,854,000	995,000	2,277,376
27	Mar 30, 2026 16:46	3,168	63,479,356	32,853,000	1,991,000	2,404,352
28	Mar 30, 2026 16:38	3,168	63,238,555	34,848,000	0	2,408,448
29	Mar 30, 2026 16:45	3,168	63,488,064	33,855,000	995,000	2,396,160
30	Mar 30, 2026 16:45	3,169	65,693,312	33,868,000	996,000	2,396,160
31	Mar 30, 2026 16:38	3,169	68,435,916	32,865,000	1,991,000	2,277,376
32	Mar 30, 2026 16:41	3,169	61,175,643	34,856,000	0	2,277,376
33	Mar 30, 2026 16:49	3,169	62,203,316	33,864,000	996,000	2,510,848
34	Mar 30, 2026 16:49	3,169	59,184,945	33,862,000	995,000	2,277,376
35	Mar 30, 2026 16:43	3,169	63,219,943	33,859,000	995,000	2,396,160
36	Mar 30, 2026 16:47	3,170	61,058,676	32,873,000	1,992,000	2,404,352
37	Mar 30, 2026 16:50	3,170	61,176,572	33,869,000	996,000	2,277,376
38	Mar 30, 2026 16:41	3,170	58,576,412	32,879,000	1,992,000	2,400,256
39	Mar 30, 2026 16:43	3,171	57,638,043	34,880,000	0	2,404,352
40	Mar 30, 2026 16:48	3,175	61,565,652	33,932,000	998,000	2,404,352
41	Mar 30, 2026 16:43	3,175	65,325,982	32,927,000	1,995,000	2,392,064
42	Mar 30, 2026 16:50	3,176	57,650,372	33,934,000	998,000	2,396,160
43	Mar 30, 2026 16:39	3,176	62,203,224	32,944,000	1,996,000	2,277,376
44	Mar 30, 2026 16:51	3,176	63,645,505	33,935,000	998,000	2,277,376
45	Mar 30, 2026 16:42	3,176	61,863,976	32,943,000	1,996,000	2,277,376
46	Mar 30, 2026 16:40	3,177	57,966,614	32,952,000	1,997,000	2,400,256
47	Mar 30, 2026 16:52	3,177	58,273,526	32,948,000	1,996,000	2,277,376
48	Mar 30, 2026 16:39	3,178	57,707,126	33,960,000	998,000	2,277,376
49	Mar 30, 2026 16:42	3,178	65,435,986	32,958,000	1,997,000	2,277,376
50	Mar 30, 2026 16:53	3,180	58,537,515	33,979,000	999,000	2,277,376
51	Mar 30, 2026 16:46	3,181	60,204,941	32,993,000	1,999,000	2,277,376
52	Mar 30, 2026 16:43	3,181	58,156,015	32,993,000	1,999,000	2,277,376
53	Mar 30, 2026 16:47	3,182	62,268,252	33,000,000	2,000,000	2,277,376
54	Mar 30, 2026 16:51	3,183	59,062,145	33,011,000	2,000,000	2,277,376
55	Mar 30, 2026 16:39	3,183	56,870,438	34,016,000	1,000,000	2,490,368
56	Mar 30, 2026 16:53	3,183	56,301,635	33,008,000	2,000,000	2,277,376
57	Mar 30, 2026 16:47	3,187	58,768,748	33,051,000	2,003,000	2,396,160
58	Mar 30, 2026 16:52	3,187	61,000,235	33,058,000	2,003,000	2,277,376
59	Mar 30, 2026 16:44	3,187	62,659,985	34,055,000	1,001,000	2,277,376
60	Mar 30, 2026 16:41	3,191	55,567,709	34,102,000	1,003,000	2,449,408

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