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 03:25	3,145	58,740,731	33,577,000	1,017,000	2,277,376
2	Mar 30, 2026 03:22	3,147	60,798,359	33,601,000	1,018,000	2,408,448
3	Mar 30, 2026 03:28	3,149	66,144,045	33,625,000	1,018,000	2,277,376
4	Mar 30, 2026 03:25	3,149	59,588,402	33,624,000	1,018,000	2,396,160
5	Mar 30, 2026 03:20	3,150	61,381,613	33,635,000	1,019,000	2,404,352
6	Mar 30, 2026 03:27	3,150	63,799,925	33,636,000	1,019,000	2,277,376
7	Mar 30, 2026 03:28	3,153	59,461,376	33,661,000	1,020,000	2,396,160
8	Mar 30, 2026 03:19	3,159	56,216,021	32,763,000	1,985,000	2,396,160
9	Mar 30, 2026 03:18	3,162	59,349,765	33,787,000	993,000	2,273,280
10	Mar 30, 2026 03:25	3,165	63,471,804	34,820,000	0	2,277,376
11	Mar 30, 2026 03:18	3,165	65,096,164	33,816,000	994,000	2,277,376
12	Mar 30, 2026 03:17	3,168	62,714,015	34,844,000	0	2,277,376
13	Mar 30, 2026 03:24	3,168	61,244,974	33,848,000	995,000	2,400,256
14	Mar 30, 2026 03:23	3,168	68,483,188	32,859,000	1,991,000	2,277,376
15	Mar 30, 2026 03:22	3,168	59,733,795	33,858,000	995,000	2,404,352
16	Mar 30, 2026 03:22	3,168	64,662,244	32,854,000	1,991,000	2,277,376
17	Mar 30, 2026 03:21	3,168	64,008,470	34,850,000	0	2,400,256
18	Mar 30, 2026 03:21	3,168	59,875,263	32,857,000	1,991,000	2,277,376
19	Mar 30, 2026 03:17	3,168	63,740,733	32,852,000	1,991,000	2,277,376
20	Mar 30, 2026 03:18	3,168	67,218,608	34,843,000	0	2,396,160
21	Mar 30, 2026 03:21	3,169	61,089,078	33,865,000	996,000	2,277,376
22	Mar 30, 2026 03:18	3,169	63,631,153	32,865,000	1,991,000	2,277,376
23	Mar 30, 2026 03:26	3,169	63,740,524	32,866,000	1,991,000	2,277,376
24	Mar 30, 2026 03:24	3,169	66,188,211	33,865,000	996,000	2,396,160
25	Mar 30, 2026 03:24	3,169	61,134,000	32,864,000	1,991,000	2,277,376
26	Mar 30, 2026 03:23	3,169	62,653,767	34,859,000	0	2,277,376
27	Mar 30, 2026 03:19	3,169	63,696,900	33,864,000	996,000	2,506,752
28	Mar 30, 2026 03:22	3,169	65,134,494	32,864,000	1,991,000	2,277,376
29	Mar 30, 2026 03:27	3,169	62,877,136	33,860,000	995,000	2,277,376
30	Mar 30, 2026 03:20	3,169	59,250,960	33,863,000	995,000	2,277,376
31	Mar 30, 2026 03:28	3,169	64,143,786	33,860,000	995,000	2,404,352
32	Mar 30, 2026 03:22	3,170	56,340,110	32,875,000	1,992,000	2,404,352
33	Mar 30, 2026 03:22	3,170	66,060,787	32,877,000	1,992,000	2,392,064
34	Mar 30, 2026 03:19	3,170	60,554,623	33,871,000	996,000	2,392,064
35	Mar 30, 2026 03:26	3,170	62,186,602	33,872,000	996,000	2,392,064
36	Mar 30, 2026 03:19	3,170	59,074,842	33,870,000	996,000	2,277,376
37	Mar 30, 2026 03:27	3,170	60,687,138	33,870,000	996,000	2,400,256
38	Mar 30, 2026 03:25	3,171	60,632,636	33,889,000	996,000	2,277,376
39	Mar 30, 2026 03:18	3,171	58,005,580	32,885,000	1,993,000	2,396,160
40	Mar 30, 2026 03:20	3,171	57,964,307	32,888,000	1,993,000	2,277,376
41	Mar 30, 2026 03:21	3,171	57,402,650	33,881,000	996,000	2,277,376
42	Mar 30, 2026 03:28	3,172	61,193,029	33,891,000	996,000	2,400,256
43	Mar 30, 2026 03:23	3,172	64,570,843	33,896,000	996,000	2,396,160
44	Mar 30, 2026 03:27	3,172	62,185,233	33,893,000	996,000	2,392,064
45	Mar 30, 2026 03:21	3,173	57,916,674	33,908,000	997,000	2,404,352
46	Mar 30, 2026 03:24	3,174	58,073,795	32,921,000	1,995,000	2,277,376
47	Mar 30, 2026 03:24	3,174	64,001,546	32,920,000	1,995,000	2,277,376
48	Mar 30, 2026 03:28	3,175	58,144,600	32,928,000	1,995,000	2,396,160
49	Mar 30, 2026 03:19	3,179	58,787,911	33,972,000	999,000	2,277,376
50	Mar 30, 2026 03:19	3,179	57,052,403	32,974,000	1,998,000	2,281,472
51	Mar 30, 2026 03:25	3,180	56,973,512	32,978,000	1,998,000	2,277,376
52	Mar 30, 2026 03:27	3,180	59,164,708	32,979,000	1,998,000	2,277,376
53	Mar 30, 2026 03:27	3,181	57,577,241	32,995,000	1,999,000	2,277,376
54	Mar 30, 2026 03:24	3,181	60,407,869	33,988,000	999,000	2,277,376
55	Mar 30, 2026 03:25	3,182	64,312,860	33,003,000	2,000,000	2,277,376
56	Mar 30, 2026 03:17	3,184	58,903,387	33,020,000	2,001,000	2,277,376
57	Mar 30, 2026 03:18	3,184	57,978,763	34,029,000	1,000,000	2,277,376
58	Mar 30, 2026 03:21	3,185	58,624,786	33,037,000	2,002,000	2,277,376
59	Mar 30, 2026 03:28	3,185	54,261,591	33,035,000	2,002,000	2,277,376
60	Mar 30, 2026 03:26	3,188	64,978,004	33,061,000	2,003,000	2,277,376

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