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 08:59	3,151	65,691,834	33,640,000	1,019,000	2,277,376
2	Mar 30, 2026 08:50	3,151	67,166,299	34,659,000	0	2,277,376
3	Mar 30, 2026 09:00	3,152	60,794,105	33,652,000	1,019,000	2,277,376
4	Mar 30, 2026 08:51	3,152	60,687,406	33,653,000	1,019,000	2,277,376
5	Mar 30, 2026 08:53	3,152	62,398,654	33,656,000	1,019,000	2,400,256
6	Mar 30, 2026 08:58	3,155	62,893,766	33,686,000	1,020,000	2,277,376
7	Mar 30, 2026 08:50	3,156	69,773,875	34,719,000	0	2,277,376
8	Mar 30, 2026 08:55	3,156	59,061,154	32,731,000	1,983,000	2,277,376
9	Mar 30, 2026 08:53	3,161	66,292,787	32,782,000	1,986,000	2,404,352
10	Mar 30, 2026 09:02	3,164	60,688,381	33,813,000	994,000	2,387,968
11	Mar 30, 2026 08:57	3,166	62,502,012	33,836,000	995,000	2,392,064
12	Mar 30, 2026 08:51	3,166	61,158,882	33,836,000	995,000	2,277,376
13	Mar 30, 2026 08:54	3,167	63,727,142	32,845,000	1,990,000	2,392,064
14	Mar 30, 2026 08:53	3,167	59,650,932	34,841,000	0	2,277,376
15	Mar 30, 2026 08:57	3,167	60,280,711	33,841,000	995,000	2,400,256
16	Mar 30, 2026 08:59	3,167	69,066,462	33,838,000	995,000	2,277,376
17	Mar 30, 2026 09:01	3,168	60,848,916	33,853,000	995,000	2,277,376
18	Mar 30, 2026 08:56	3,168	64,914,297	32,853,000	1,991,000	2,277,376
19	Mar 30, 2026 08:55	3,168	62,121,809	33,857,000	995,000	2,277,376
20	Mar 30, 2026 08:57	3,168	60,409,259	34,844,000	0	2,400,256
21	Mar 30, 2026 08:55	3,168	64,534,021	33,853,000	995,000	2,277,376
22	Mar 30, 2026 08:54	3,168	58,834,937	34,843,000	0	2,277,376
23	Mar 30, 2026 08:50	3,168	61,775,829	32,858,000	1,991,000	2,396,160
24	Mar 30, 2026 09:01	3,168	59,845,489	32,854,000	1,991,000	2,277,376
25	Mar 30, 2026 08:52	3,168	61,881,358	33,849,000	995,000	2,277,376
26	Mar 30, 2026 08:52	3,168	65,292,224	33,857,000	995,000	2,396,160
27	Mar 30, 2026 08:49	3,169	60,478,609	32,868,000	1,992,000	2,404,352
28	Mar 30, 2026 09:02	3,169	57,787,806	33,868,000	996,000	2,400,256
29	Mar 30, 2026 08:58	3,169	60,281,135	32,867,000	1,991,000	2,404,352
30	Mar 30, 2026 08:50	3,169	65,646,582	32,868,000	1,992,000	2,510,848
31	Mar 30, 2026 09:00	3,169	62,032,640	33,866,000	996,000	2,400,256
32	Mar 30, 2026 09:01	3,169	65,855,740	32,869,000	1,992,000	2,392,064
33	Mar 30, 2026 08:55	3,169	62,120,536	33,864,000	996,000	2,277,376
34	Mar 30, 2026 09:00	3,170	64,466,091	32,873,000	1,992,000	2,387,968
35	Mar 30, 2026 08:52	3,170	61,740,271	32,878,000	1,992,000	2,277,376
36	Mar 30, 2026 08:56	3,171	64,134,607	33,880,000	996,000	2,277,376
37	Mar 30, 2026 08:55	3,171	66,575,985	32,887,000	1,993,000	2,277,376
38	Mar 30, 2026 08:58	3,171	61,208,668	33,890,000	996,000	2,392,064
39	Mar 30, 2026 08:50	3,172	60,475,411	33,896,000	996,000	2,404,352
40	Mar 30, 2026 08:59	3,172	57,282,044	32,898,000	1,993,000	2,396,160
41	Mar 30, 2026 09:01	3,172	61,424,299	32,896,000	1,993,000	2,392,064
42	Mar 30, 2026 08:57	3,173	59,846,883	32,913,000	1,994,000	2,404,352
43	Mar 30, 2026 09:01	3,175	55,495,986	32,925,000	1,995,000	2,277,376
44	Mar 30, 2026 09:01	3,176	64,169,709	32,936,000	1,996,000	2,273,280
45	Mar 30, 2026 08:49	3,176	70,423,634	33,938,000	998,000	2,404,352
46	Mar 30, 2026 08:54	3,176	64,614,618	32,938,000	1,996,000	2,404,352
47	Mar 30, 2026 08:53	3,176	59,273,977	32,944,000	1,996,000	2,392,064
48	Mar 30, 2026 08:53	3,177	59,162,544	33,947,000	998,000	2,277,376
49	Mar 30, 2026 08:51	3,177	57,774,438	32,949,000	1,996,000	2,400,256
50	Mar 30, 2026 08:57	3,178	63,135,290	32,956,000	1,997,000	2,408,448
51	Mar 30, 2026 08:58	3,180	57,119,761	33,979,000	999,000	2,277,376
52	Mar 30, 2026 08:50	3,180	58,653,740	33,981,000	999,000	2,277,376
53	Mar 30, 2026 08:58	3,181	59,999,307	33,988,000	999,000	2,273,280
54	Mar 30, 2026 08:53	3,182	58,636,922	34,000,000	1,000,000	2,387,968
55	Mar 30, 2026 08:49	3,182	61,523,303	33,998,000	999,000	2,404,352
56	Mar 30, 2026 08:58	3,184	64,005,891	33,022,000	2,001,000	2,486,272
57	Mar 30, 2026 08:56	3,185	60,809,579	33,038,000	2,002,000	2,273,280
58	Mar 30, 2026 08:57	3,186	60,396,519	33,046,000	2,002,000	2,396,160
59	Mar 30, 2026 08:55	3,186	57,390,829	34,040,000	1,001,000	2,273,280
60	Mar 30, 2026 09:02	3,190	68,222,881	35,088,000	0	2,392,064

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