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 01:32	3,139	58,258,919	33,516,000	1,015,000	2,408,448
2	Mar 30, 2026 01:23	3,145	59,814,322	33,575,000	1,017,000	2,400,256
3	Mar 30, 2026 01:28	3,153	62,302,524	33,663,000	1,020,000	2,277,376
4	Mar 30, 2026 01:24	3,153	61,785,522	33,660,000	1,020,000	2,277,376
5	Mar 30, 2026 01:25	3,153	62,328,881	34,680,000	0	2,277,376
6	Mar 30, 2026 01:26	3,154	67,931,416	34,692,000	0	2,277,376
7	Mar 30, 2026 01:25	3,154	72,580,522	33,678,000	1,020,000	2,277,376
8	Mar 30, 2026 01:33	3,154	65,065,983	33,673,000	1,020,000	2,387,968
9	Mar 30, 2026 01:29	3,155	61,132,243	34,700,000	0	2,396,160
10	Mar 30, 2026 01:30	3,155	63,711,605	33,685,000	1,020,000	2,277,376
11	Mar 30, 2026 01:37	3,155	64,299,530	33,687,000	1,020,000	2,400,256
12	Mar 30, 2026 01:33	3,158	59,454,227	33,715,000	1,021,000	2,396,160
13	Mar 30, 2026 01:26	3,161	63,397,333	33,779,000	993,000	2,277,376
14	Mar 30, 2026 01:33	3,164	60,191,586	33,814,000	994,000	2,277,376
15	Mar 30, 2026 01:26	3,164	61,325,930	32,816,000	1,988,000	2,277,376
16	Mar 30, 2026 01:28	3,164	62,737,916	33,812,000	994,000	2,277,376
17	Mar 30, 2026 01:29	3,165	63,077,267	33,816,000	994,000	2,396,160
18	Mar 30, 2026 01:24	3,166	59,746,913	34,823,000	0	2,277,376
19	Mar 30, 2026 01:34	3,167	63,390,926	33,843,000	995,000	2,277,376
20	Mar 30, 2026 01:26	3,167	65,134,154	33,846,000	995,000	2,396,160
21	Mar 30, 2026 01:30	3,167	60,863,553	34,842,000	0	2,277,376
22	Mar 30, 2026 01:29	3,168	60,804,171	33,858,000	995,000	2,404,352
23	Mar 30, 2026 01:29	3,168	65,031,730	34,848,000	0	2,277,376
24	Mar 30, 2026 01:34	3,168	64,058,406	33,857,000	995,000	2,277,376
25	Mar 30, 2026 01:31	3,168	62,372,628	32,854,000	1,991,000	2,277,376
26	Mar 30, 2026 01:31	3,168	60,820,445	32,858,000	1,991,000	2,494,464
27	Mar 30, 2026 01:26	3,168	67,835,485	32,853,000	1,991,000	2,490,368
28	Mar 30, 2026 01:30	3,169	61,699,195	32,868,000	1,992,000	2,277,376
29	Mar 30, 2026 01:29	3,169	63,450,889	33,861,000	995,000	2,392,064
30	Mar 30, 2026 01:23	3,169	64,646,139	32,869,000	1,992,000	2,404,352
31	Mar 30, 2026 01:37	3,169	59,450,556	33,868,000	996,000	2,392,064
32	Mar 30, 2026 01:34	3,169	59,891,631	34,855,000	0	2,277,376
33	Mar 30, 2026 01:29	3,169	62,674,501	34,854,000	0	2,490,368
34	Mar 30, 2026 01:24	3,169	60,822,195	32,863,000	1,991,000	2,400,256
35	Mar 30, 2026 01:25	3,169	62,092,947	33,868,000	996,000	2,277,376
36	Mar 30, 2026 01:23	3,169	59,328,991	33,866,000	996,000	2,510,848
37	Mar 30, 2026 01:24	3,169	59,494,058	32,867,000	1,991,000	2,400,256
38	Mar 30, 2026 01:24	3,170	63,968,684	33,871,000	996,000	2,277,376
39	Mar 30, 2026 01:25	3,170	66,287,516	33,873,000	996,000	2,277,376
40	Mar 30, 2026 01:24	3,170	61,827,802	32,877,000	1,992,000	2,277,376
41	Mar 30, 2026 01:34	3,170	56,581,956	33,870,000	996,000	2,277,376
42	Mar 30, 2026 01:28	3,170	65,767,566	32,874,000	1,992,000	2,277,376
43	Mar 30, 2026 01:27	3,171	60,043,569	33,882,000	996,000	2,277,376
44	Mar 30, 2026 01:28	3,171	59,398,534	33,890,000	996,000	2,396,160
45	Mar 30, 2026 01:27	3,172	64,186,537	32,900,000	1,993,000	2,277,376
46	Mar 30, 2026 01:31	3,174	56,685,041	32,921,000	1,995,000	2,412,544
47	Mar 30, 2026 01:33	3,174	56,504,225	33,913,000	997,000	2,392,064
48	Mar 30, 2026 01:32	3,175	63,477,855	33,932,000	998,000	2,277,376
49	Mar 30, 2026 01:34	3,176	61,688,869	33,941,000	998,000	2,392,064
50	Mar 30, 2026 01:34	3,176	59,022,072	33,936,000	998,000	2,506,752
51	Mar 30, 2026 01:37	3,176	56,276,005	32,936,000	1,996,000	2,277,376
52	Mar 30, 2026 01:25	3,176	57,930,826	33,943,000	998,000	2,396,160
53	Mar 30, 2026 01:28	3,176	65,207,421	32,935,000	1,996,000	2,408,448
54	Mar 30, 2026 01:32	3,177	67,150,874	33,948,000	998,000	2,396,160
55	Mar 30, 2026 01:27	3,180	59,709,823	32,985,000	1,999,000	2,400,256
56	Mar 30, 2026 01:33	3,182	60,796,105	34,005,000	1,000,000	2,392,064
57	Mar 30, 2026 01:33	3,182	60,737,524	34,004,000	1,000,000	2,277,376
58	Mar 30, 2026 01:26	3,183	59,568,279	33,015,000	2,000,000	2,277,376
59	Mar 30, 2026 01:25	3,188	61,087,532	34,070,000	1,002,000	2,277,376
60	Mar 30, 2026 01:28	3,199	57,723,212	33,179,000	2,010,000	2,277,376

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