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 11:57	3,151	59,564,762	34,661,000	0	2,404,352
2	Mar 30, 2026 11:59	3,153	67,081,383	34,686,000	0	2,510,848
3	Mar 30, 2026 11:51	3,153	65,229,065	34,686,000	0	2,396,160
4	Mar 30, 2026 11:50	3,153	60,318,880	34,685,000	0	2,404,352
5	Mar 30, 2026 11:58	3,154	65,445,531	34,689,000	0	2,277,376
6	Mar 30, 2026 11:56	3,154	59,623,623	33,676,000	1,020,000	2,277,376
7	Mar 30, 2026 11:52	3,154	59,221,529	33,676,000	1,020,000	2,396,160
8	Mar 30, 2026 11:51	3,155	62,277,988	34,705,000	0	2,392,064
9	Mar 30, 2026 11:49	3,157	60,398,571	33,701,000	1,021,000	2,269,184
10	Mar 30, 2026 12:00	3,157	62,451,255	33,735,000	992,000	2,277,376
11	Mar 30, 2026 11:54	3,164	60,335,536	32,815,000	1,988,000	2,400,256
12	Mar 30, 2026 11:58	3,167	60,516,019	32,846,000	1,990,000	2,396,160
13	Mar 30, 2026 11:51	3,167	65,639,009	33,847,000	995,000	2,277,376
14	Mar 30, 2026 11:49	3,168	60,580,757	33,848,000	995,000	2,510,848
15	Mar 30, 2026 11:55	3,168	59,373,174	33,852,000	995,000	2,494,464
16	Mar 30, 2026 11:58	3,168	62,008,487	34,848,000	0	2,396,160
17	Mar 30, 2026 11:54	3,168	63,923,480	33,857,000	995,000	2,273,280
18	Mar 30, 2026 11:53	3,168	64,240,323	33,849,000	995,000	2,277,376
19	Mar 30, 2026 11:49	3,168	63,183,233	32,857,000	1,991,000	2,396,160
20	Mar 30, 2026 12:02	3,168	64,091,133	32,860,000	1,991,000	2,277,376
21	Mar 30, 2026 12:02	3,168	66,019,762	33,855,000	995,000	2,277,376
22	Mar 30, 2026 12:01	3,168	60,420,019	33,853,000	995,000	2,277,376
23	Mar 30, 2026 11:53	3,169	61,271,066	32,870,000	1,992,000	2,277,376
24	Mar 30, 2026 11:56	3,169	61,981,872	33,860,000	995,000	2,404,352
25	Mar 30, 2026 11:58	3,169	63,981,582	32,863,000	1,991,000	2,277,376
26	Mar 30, 2026 11:51	3,169	63,916,631	32,866,000	1,991,000	2,400,256
27	Mar 30, 2026 11:52	3,169	60,629,687	33,867,000	996,000	2,400,256
28	Mar 30, 2026 11:53	3,169	61,897,830	32,863,000	1,991,000	2,400,256
29	Mar 30, 2026 11:55	3,170	62,680,142	32,873,000	1,992,000	2,277,376
30	Mar 30, 2026 11:53	3,170	63,639,319	33,872,000	996,000	2,277,376
31	Mar 30, 2026 11:51	3,171	64,704,289	32,887,000	1,993,000	2,277,376
32	Mar 30, 2026 12:01	3,171	64,243,468	32,886,000	1,993,000	2,392,064
33	Mar 30, 2026 12:01	3,172	59,111,000	33,898,000	997,000	2,400,256
34	Mar 30, 2026 11:58	3,172	55,552,622	33,892,000	996,000	2,404,352
35	Mar 30, 2026 11:59	3,172	56,879,744	32,899,000	1,993,000	2,277,376
36	Mar 30, 2026 11:56	3,172	62,060,557	32,895,000	1,993,000	2,277,376
37	Mar 30, 2026 11:56	3,172	60,478,558	32,901,000	1,994,000	2,277,376
38	Mar 30, 2026 11:49	3,173	57,588,780	32,910,000	1,994,000	2,277,376
39	Mar 30, 2026 11:57	3,174	61,862,769	32,916,000	1,994,000	2,277,376
40	Mar 30, 2026 11:50	3,174	64,492,859	32,924,000	1,995,000	2,404,352
41	Mar 30, 2026 11:56	3,174	65,563,163	32,918,000	1,995,000	2,396,160
42	Mar 30, 2026 12:01	3,175	58,204,875	32,934,000	1,996,000	2,277,376
43	Mar 30, 2026 11:58	3,176	64,095,204	32,935,000	1,996,000	2,396,160
44	Mar 30, 2026 11:59	3,176	61,377,009	33,938,000	998,000	2,400,256
45	Mar 30, 2026 12:01	3,176	54,260,011	33,934,000	998,000	2,273,280
46	Mar 30, 2026 12:00	3,178	56,518,166	32,959,000	1,997,000	2,277,376
47	Mar 30, 2026 11:57	3,179	60,201,828	32,973,000	1,998,000	2,277,376
48	Mar 30, 2026 11:53	3,180	54,218,369	32,983,000	1,998,000	2,502,656
49	Mar 30, 2026 11:55	3,181	59,355,642	32,996,000	1,999,000	2,392,064
50	Mar 30, 2026 11:56	3,181	58,500,233	33,990,000	999,000	2,400,256
51	Mar 30, 2026 11:53	3,181	59,621,445	33,991,000	999,000	2,392,064
52	Mar 30, 2026 12:00	3,181	56,429,629	33,991,000	999,000	2,277,376
53	Mar 30, 2026 12:02	3,182	62,277,770	34,004,000	1,000,000	2,392,064
54	Mar 30, 2026 11:54	3,182	59,581,418	33,004,000	2,000,000	2,277,376
55	Mar 30, 2026 12:01	3,183	54,409,111	34,015,000	1,000,000	2,277,376
56	Mar 30, 2026 11:51	3,183	70,128,723	34,018,000	1,000,000	2,396,160
57	Mar 30, 2026 11:49	3,183	61,741,284	34,016,000	1,000,000	2,392,064
58	Mar 30, 2026 11:49	3,185	56,729,092	33,031,000	2,001,000	2,404,352
59	Mar 30, 2026 11:52	3,190	57,294,106	34,090,000	1,002,000	2,400,256
60	Mar 30, 2026 11:50	3,191	57,992,552	33,094,000	2,005,000	2,277,376

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