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 07:52	3,151	64,308,610	33,642,000	1,019,000	2,396,160
2	Mar 30, 2026 07:52	3,153	67,114,248	34,688,000	0	2,396,160
3	Mar 30, 2026 07:56	3,154	59,981,233	33,670,000	1,020,000	2,277,376
4	Mar 30, 2026 07:54	3,154	67,479,594	34,695,000	0	2,396,160
5	Mar 30, 2026 07:50	3,154	61,479,024	33,674,000	1,020,000	2,277,376
6	Mar 30, 2026 07:56	3,155	63,818,972	33,683,000	1,020,000	2,277,376
7	Mar 30, 2026 07:56	3,155	66,799,049	33,690,000	1,020,000	2,400,256
8	Mar 30, 2026 07:49	3,156	66,835,239	33,694,000	1,021,000	2,277,376
9	Mar 30, 2026 08:02	3,162	58,037,592	33,785,000	993,000	2,387,968
10	Mar 30, 2026 07:56	3,166	60,405,160	33,836,000	995,000	2,510,848
11	Mar 30, 2026 08:01	3,167	60,588,826	34,841,000	0	2,277,376
12	Mar 30, 2026 07:51	3,167	60,920,955	33,846,000	995,000	2,392,064
13	Mar 30, 2026 07:49	3,167	60,254,286	32,850,000	1,990,000	2,277,376
14	Mar 30, 2026 07:54	3,167	67,329,910	33,843,000	995,000	2,277,376
15	Mar 30, 2026 07:52	3,168	61,454,774	33,856,000	995,000	2,277,376
16	Mar 30, 2026 07:57	3,168	60,772,694	32,856,000	1,991,000	2,277,376
17	Mar 30, 2026 07:58	3,168	70,701,260	33,851,000	995,000	2,273,280
18	Mar 30, 2026 07:59	3,168	59,424,955	33,857,000	995,000	2,277,376
19	Mar 30, 2026 07:54	3,168	61,183,823	32,854,000	1,991,000	2,396,160
20	Mar 30, 2026 07:52	3,168	61,334,216	33,858,000	995,000	2,277,376
21	Mar 30, 2026 07:52	3,168	64,311,938	33,850,000	995,000	2,277,376
22	Mar 30, 2026 08:02	3,168	66,729,886	34,850,000	0	2,277,376
23	Mar 30, 2026 08:00	3,168	59,943,160	32,859,000	1,991,000	2,400,256
24	Mar 30, 2026 08:00	3,168	64,551,528	32,861,000	1,991,000	2,277,376
25	Mar 30, 2026 07:50	3,168	60,922,490	33,853,000	995,000	2,277,376
26	Mar 30, 2026 08:01	3,168	65,750,668	33,853,000	995,000	2,387,968
27	Mar 30, 2026 07:50	3,168	63,824,462	32,857,000	1,991,000	2,277,376
28	Mar 30, 2026 08:02	3,169	67,639,004	34,862,000	0	2,387,968
29	Mar 30, 2026 08:00	3,169	56,902,246	32,865,000	1,991,000	2,387,968
30	Mar 30, 2026 07:59	3,169	59,871,533	33,862,000	995,000	2,392,064
31	Mar 30, 2026 08:00	3,169	60,704,012	34,861,000	0	2,396,160
32	Mar 30, 2026 08:00	3,169	62,388,651	32,865,000	1,991,000	2,277,376
33	Mar 30, 2026 07:49	3,169	62,266,031	34,861,000	0	2,277,376
34	Mar 30, 2026 07:49	3,169	65,319,044	33,867,000	996,000	2,277,376
35	Mar 30, 2026 07:52	3,169	64,551,054	33,867,000	996,000	2,277,376
36	Mar 30, 2026 07:50	3,170	60,602,302	33,842,000	1,025,000	2,277,376
37	Mar 30, 2026 07:57	3,170	64,804,204	32,873,000	1,992,000	2,404,352
38	Mar 30, 2026 08:00	3,170	59,215,910	33,876,000	996,000	2,277,376
39	Mar 30, 2026 07:55	3,170	61,690,893	33,849,000	1,025,000	2,273,280
40	Mar 30, 2026 07:54	3,171	62,037,450	32,886,000	1,993,000	2,396,160
41	Mar 30, 2026 08:02	3,174	59,161,865	33,913,000	997,000	2,277,376
42	Mar 30, 2026 07:49	3,174	62,180,358	32,921,000	1,995,000	2,277,376
43	Mar 30, 2026 07:54	3,175	59,448,682	33,932,000	998,000	2,277,376
44	Mar 30, 2026 08:01	3,175	62,858,578	33,926,000	997,000	2,387,968
45	Mar 30, 2026 07:50	3,176	55,908,690	32,945,000	1,996,000	2,404,352
46	Mar 30, 2026 07:56	3,177	61,380,057	33,953,000	998,000	2,277,376
47	Mar 30, 2026 07:55	3,177	59,204,671	33,945,000	998,000	2,396,160
48	Mar 30, 2026 07:58	3,178	56,454,382	33,960,000	998,000	2,400,256
49	Mar 30, 2026 08:02	3,178	66,495,830	33,958,000	998,000	2,277,376
50	Mar 30, 2026 08:02	3,179	60,082,984	32,970,000	1,998,000	2,277,376
51	Mar 30, 2026 07:51	3,179	55,539,175	33,975,000	999,000	2,273,280
52	Mar 30, 2026 07:56	3,180	62,120,284	32,979,000	1,998,000	2,277,376
53	Mar 30, 2026 07:49	3,181	56,289,333	33,993,000	999,000	2,510,848
54	Mar 30, 2026 07:54	3,181	59,967,958	32,991,000	1,999,000	2,392,064
55	Mar 30, 2026 07:59	3,182	55,823,727	33,005,000	2,000,000	2,277,376
56	Mar 30, 2026 07:58	3,183	61,285,614	34,016,000	1,000,000	2,408,448
57	Mar 30, 2026 07:50	3,184	64,148,239	33,023,000	2,001,000	2,404,352
58	Mar 30, 2026 07:51	3,186	59,955,971	35,044,000	0	2,277,376
59	Mar 30, 2026 07:57	3,188	62,547,954	33,060,000	2,003,000	2,277,376
60	Mar 30, 2026 07:55	3,188	57,564,844	34,071,000	1,002,000	2,494,464

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