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 01:08	3,147	62,075,268	34,618,000	0	2,396,160
2	Mar 30, 2026 01:12	3,149	64,913,612	34,637,000	0	2,277,376
3	Mar 30, 2026 01:04	3,149	64,671,766	33,624,000	1,018,000	2,277,376
4	Mar 30, 2026 01:10	3,151	64,540,874	34,663,000	0	2,277,376
5	Mar 30, 2026 01:06	3,152	61,283,236	33,654,000	1,019,000	2,396,160
6	Mar 30, 2026 01:03	3,152	71,350,892	33,657,000	1,019,000	2,404,352
7	Mar 30, 2026 01:12	3,153	58,324,786	34,684,000	0	2,281,472
8	Mar 30, 2026 01:06	3,153	59,689,012	33,665,000	1,020,000	2,400,256
9	Mar 30, 2026 01:14	3,153	60,915,723	33,659,000	1,019,000	2,396,160
10	Mar 30, 2026 01:08	3,153	61,522,030	33,667,000	1,020,000	2,277,376
11	Mar 30, 2026 01:05	3,154	60,055,741	34,692,000	0	2,277,376
12	Mar 30, 2026 01:01	3,154	58,294,828	34,690,000	0	2,404,352
13	Mar 30, 2026 01:05	3,154	62,157,709	34,693,000	0	2,400,256
14	Mar 30, 2026 01:09	3,155	61,187,403	34,702,000	0	2,404,352
15	Mar 30, 2026 01:13	3,158	66,931,519	33,713,000	1,021,000	2,277,376
16	Mar 30, 2026 01:03	3,161	57,941,059	34,772,000	0	2,277,376
17	Mar 30, 2026 01:09	3,166	62,284,756	33,832,000	995,000	2,510,848
18	Mar 30, 2026 01:02	3,167	63,826,621	33,845,000	995,000	2,277,376
19	Mar 30, 2026 01:06	3,167	60,765,078	32,846,000	1,990,000	2,396,160
20	Mar 30, 2026 01:11	3,167	63,560,982	34,842,000	0	2,277,376
21	Mar 30, 2026 01:08	3,167	64,060,978	32,847,000	1,990,000	2,404,352
22	Mar 30, 2026 01:12	3,168	66,285,549	33,852,000	995,000	2,277,376
23	Mar 30, 2026 01:14	3,168	60,150,979	33,857,000	995,000	2,400,256
24	Mar 30, 2026 01:11	3,168	58,470,778	33,848,000	995,000	2,400,256
25	Mar 30, 2026 01:09	3,168	60,731,105	34,848,000	0	2,277,376
26	Mar 30, 2026 01:11	3,168	61,894,507	33,855,000	995,000	2,392,064
27	Mar 30, 2026 01:08	3,168	64,828,809	33,848,000	995,000	2,400,256
28	Mar 30, 2026 01:08	3,168	63,591,593	33,852,000	995,000	2,478,080
29	Mar 30, 2026 01:02	3,168	64,506,286	33,850,000	995,000	2,277,376
30	Mar 30, 2026 01:07	3,168	62,645,237	33,852,000	995,000	2,277,376
31	Mar 30, 2026 01:07	3,168	60,879,280	32,853,000	1,991,000	2,277,376
32	Mar 30, 2026 01:11	3,168	61,132,059	33,857,000	995,000	2,277,376
33	Mar 30, 2026 01:13	3,169	63,074,213	34,862,000	0	2,277,376
34	Mar 30, 2026 01:12	3,169	64,600,000	32,863,000	1,991,000	2,277,376
35	Mar 30, 2026 01:01	3,169	64,333,315	32,868,000	1,992,000	2,277,376
36	Mar 30, 2026 01:04	3,169	62,126,597	32,869,000	1,992,000	2,510,848
37	Mar 30, 2026 01:05	3,169	64,654,758	32,864,000	1,991,000	2,277,376
38	Mar 30, 2026 01:05	3,170	60,374,574	33,873,000	996,000	2,400,256
39	Mar 30, 2026 01:14	3,171	58,955,046	33,885,000	996,000	2,396,160
40	Mar 30, 2026 01:04	3,171	61,531,014	33,880,000	996,000	2,408,448
41	Mar 30, 2026 01:05	3,171	62,927,837	32,885,000	1,993,000	2,404,352
42	Mar 30, 2026 01:14	3,173	60,443,341	32,911,000	1,994,000	2,400,256
43	Mar 30, 2026 01:12	3,176	59,698,721	33,943,000	998,000	2,396,160
44	Mar 30, 2026 01:07	3,176	57,706,031	32,943,000	1,996,000	2,277,376
45	Mar 30, 2026 01:14	3,177	64,739,898	33,946,000	998,000	2,273,280
46	Mar 30, 2026 01:11	3,178	65,571,415	33,957,000	998,000	2,277,376
47	Mar 30, 2026 01:09	3,178	63,012,182	32,957,000	1,997,000	2,277,376
48	Mar 30, 2026 01:05	3,179	58,887,331	33,968,000	999,000	2,277,376
49	Mar 30, 2026 01:09	3,179	61,759,597	32,971,000	1,998,000	2,277,376
50	Mar 30, 2026 01:03	3,179	58,256,508	32,967,000	1,998,000	2,277,376
51	Mar 30, 2026 01:08	3,180	59,600,340	32,986,000	1,999,000	2,277,376
52	Mar 30, 2026 01:12	3,181	62,421,972	32,995,000	1,999,000	2,277,376
53	Mar 30, 2026 01:01	3,183	59,150,760	33,013,000	2,000,000	2,396,160
54	Mar 30, 2026 01:13	3,183	56,456,808	34,010,000	1,000,000	2,277,376
55	Mar 30, 2026 01:10	3,183	56,067,571	34,010,000	1,000,000	2,277,376
56	Mar 30, 2026 01:14	3,183	60,987,499	34,008,000	1,000,000	2,277,376
57	Mar 30, 2026 01:11	3,187	59,735,310	33,050,000	2,003,000	2,277,376
58	Mar 30, 2026 01:02	3,187	57,700,790	33,054,000	2,003,000	2,400,256
59	Mar 30, 2026 01:10	3,187	61,129,867	33,053,000	2,003,000	2,400,256
60	Mar 30, 2026 01:09	3,191	55,173,169	34,096,000	1,002,000	2,482,176

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