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 06:31	3,149	62,258,858	34,642,000	0	2,277,376
2	Mar 30, 2026 06:20	3,149	66,262,921	34,637,000	0	2,396,160
3	Mar 30, 2026 06:27	3,152	63,337,234	33,658,000	1,019,000	2,277,376
4	Mar 30, 2026 06:41	3,153	62,791,475	34,681,000	0	2,392,064
5	Mar 30, 2026 06:20	3,154	65,268,175	33,673,000	1,020,000	2,277,376
6	Mar 30, 2026 06:25	3,154	64,099,106	33,671,000	1,020,000	2,404,352
7	Mar 30, 2026 06:27	3,155	60,888,183	34,708,000	0	2,277,376
8	Mar 30, 2026 06:28	3,164	62,297,685	32,813,000	1,988,000	2,277,376
9	Mar 30, 2026 06:23	3,166	59,854,446	33,832,000	995,000	2,277,376
10	Mar 30, 2026 06:25	3,166	59,283,708	33,835,000	995,000	2,400,256
11	Mar 30, 2026 06:39	3,166	62,162,015	34,827,000	0	2,400,256
12	Mar 30, 2026 06:35	3,167	63,265,191	33,846,000	995,000	2,277,376
13	Mar 30, 2026 06:33	3,167	62,012,874	33,841,000	995,000	2,277,376
14	Mar 30, 2026 06:39	3,167	58,657,572	32,846,000	1,990,000	2,277,376
15	Mar 30, 2026 06:35	3,168	62,105,827	33,855,000	995,000	2,273,280
16	Mar 30, 2026 06:32	3,168	59,243,334	32,862,000	1,991,000	2,277,376
17	Mar 30, 2026 06:41	3,168	60,699,080	33,855,000	995,000	2,400,256
18	Mar 30, 2026 06:41	3,168	67,574,669	33,852,000	995,000	2,404,352
19	Mar 30, 2026 06:39	3,168	62,541,101	32,861,000	1,991,000	2,277,376
20	Mar 30, 2026 06:40	3,168	59,628,935	34,850,000	0	2,277,376
21	Mar 30, 2026 06:42	3,168	58,162,018	34,843,000	0	2,277,376
22	Mar 30, 2026 06:29	3,168	59,896,702	32,860,000	1,991,000	2,277,376
23	Mar 30, 2026 06:40	3,168	65,687,731	33,850,000	995,000	2,277,376
24	Mar 30, 2026 06:40	3,169	63,161,987	32,871,000	1,992,000	2,277,376
25	Mar 30, 2026 06:25	3,169	60,746,711	33,868,000	996,000	2,396,160
26	Mar 30, 2026 06:28	3,169	60,977,202	32,871,000	1,992,000	2,400,256
27	Mar 30, 2026 06:33	3,169	62,814,857	33,859,000	995,000	2,277,376
28	Mar 30, 2026 06:32	3,169	65,471,610	33,861,000	995,000	2,400,256
29	Mar 30, 2026 06:27	3,169	62,722,671	34,857,000	0	2,400,256
30	Mar 30, 2026 06:36	3,170	59,163,148	33,869,000	996,000	2,404,352
31	Mar 30, 2026 06:20	3,170	68,772,619	34,866,000	0	2,277,376
32	Mar 30, 2026 06:32	3,170	62,517,549	33,878,000	996,000	2,392,064
33	Mar 30, 2026 06:29	3,170	61,030,458	33,874,000	996,000	2,400,256
34	Mar 30, 2026 06:40	3,170	58,259,187	33,870,000	996,000	2,510,848
35	Mar 30, 2026 06:40	3,170	63,811,553	34,869,000	0	2,400,256
36	Mar 30, 2026 06:23	3,171	61,291,201	33,881,000	996,000	2,404,352
37	Mar 30, 2026 06:20	3,172	61,772,661	33,865,000	1,026,000	2,404,352
38	Mar 30, 2026 06:27	3,172	57,368,749	33,895,000	996,000	2,277,376
39	Mar 30, 2026 06:27	3,173	62,572,632	32,913,000	1,994,000	2,277,376
40	Mar 30, 2026 06:41	3,173	63,358,848	32,905,000	1,994,000	2,396,160
41	Mar 30, 2026 06:31	3,174	57,659,442	33,912,000	997,000	2,510,848
42	Mar 30, 2026 06:35	3,176	61,232,606	33,934,000	998,000	2,277,376
43	Mar 30, 2026 06:23	3,176	58,021,476	32,935,000	1,996,000	2,277,376
44	Mar 30, 2026 06:31	3,177	61,799,785	33,944,000	998,000	2,277,376
45	Mar 30, 2026 06:36	3,179	62,506,865	32,973,000	1,998,000	2,404,352
46	Mar 30, 2026 06:36	3,179	56,946,808	33,974,000	999,000	2,392,064
47	Mar 30, 2026 06:20	3,179	61,066,077	32,968,000	1,998,000	2,277,376
48	Mar 30, 2026 06:33	3,179	54,278,403	32,970,000	1,998,000	2,277,376
49	Mar 30, 2026 06:32	3,180	61,650,461	32,984,000	1,999,000	2,277,376
50	Mar 30, 2026 06:32	3,181	61,032,528	33,990,000	999,000	2,400,256
51	Mar 30, 2026 06:20	3,181	59,661,103	32,993,000	1,999,000	2,277,376
52	Mar 30, 2026 06:42	3,182	61,577,773	34,007,000	1,000,000	2,392,064
53	Mar 30, 2026 06:27	3,183	58,076,379	33,013,000	2,000,000	2,396,160
54	Mar 30, 2026 06:28	3,183	57,611,962	33,010,000	2,000,000	2,273,280
55	Mar 30, 2026 06:41	3,184	56,556,564	34,029,000	1,000,000	2,392,064
56	Mar 30, 2026 06:41	3,184	59,402,774	33,022,000	2,001,000	2,277,376
57	Mar 30, 2026 06:29	3,184	57,779,671	33,024,000	2,001,000	2,400,256
58	Mar 30, 2026 06:32	3,184	57,354,617	34,026,000	1,000,000	2,392,064
59	Mar 30, 2026 06:42	3,185	60,409,243	33,031,000	2,001,000	2,277,376
60	Mar 30, 2026 06:40	3,188	60,302,499	33,063,000	2,003,000	2,277,376

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