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 28, 2026 06:08	3,227	69,581,071	34,481,000	1,014,000	2,285,568
2	Mar 28, 2026 06:20	3,228	57,766,026	34,495,000	1,014,000	2,285,568
3	Mar 28, 2026 06:07	3,229	58,369,908	35,518,000	0	2,281,472
4	Mar 28, 2026 06:20	3,229	58,633,615	34,508,000	1,014,000	2,510,848
5	Mar 28, 2026 06:21	3,230	59,992,415	34,517,000	1,015,000	2,396,160
6	Mar 28, 2026 06:08	3,231	57,797,532	34,523,000	1,015,000	2,400,256
7	Mar 28, 2026 06:20	3,231	55,311,580	35,542,000	0	2,285,568
8	Mar 28, 2026 06:22	3,232	64,637,919	35,551,000	0	2,404,352
9	Mar 28, 2026 06:22	3,232	58,995,503	34,539,000	1,015,000	2,400,256
10	Mar 28, 2026 06:09	3,232	64,813,790	34,534,000	1,015,000	2,408,448
11	Mar 28, 2026 06:20	3,232	58,665,848	34,532,000	1,015,000	2,396,160
12	Mar 28, 2026 06:19	3,232	58,360,795	34,540,000	1,015,000	2,285,568
13	Mar 28, 2026 06:08	3,234	65,702,454	35,573,000	0	2,285,568
14	Mar 28, 2026 06:21	3,234	57,314,508	34,563,000	1,016,000	2,408,448
15	Mar 28, 2026 06:08	3,234	62,082,209	35,576,000	0	2,408,448
16	Mar 28, 2026 06:21	3,234	61,573,181	34,559,000	1,016,000	2,285,568
17	Mar 28, 2026 06:22	3,234	55,015,200	34,562,000	1,016,000	2,519,040
18	Mar 28, 2026 06:21	3,234	63,417,079	34,553,000	1,016,000	2,285,568
19	Mar 28, 2026 06:20	3,234	61,318,879	35,571,000	0	2,400,256
20	Mar 28, 2026 06:22	3,235	62,058,665	34,571,000	1,016,000	2,285,568
21	Mar 28, 2026 06:09	3,235	61,756,269	34,574,000	1,016,000	2,400,256
22	Mar 28, 2026 06:07	3,236	62,858,903	34,576,000	1,016,000	2,396,160
23	Mar 28, 2026 06:19	3,236	62,028,455	35,591,000	0	2,416,640
24	Mar 28, 2026 06:09	3,236	64,469,121	35,593,000	0	2,285,568
25	Mar 28, 2026 06:22	3,237	62,180,126	35,604,000	0	2,400,256
26	Mar 28, 2026 06:08	3,237	62,042,442	34,585,000	1,017,000	2,285,568
27	Mar 28, 2026 06:20	3,238	62,504,331	34,604,000	1,017,000	2,400,256
28	Mar 28, 2026 06:21	3,238	60,339,730	34,606,000	1,017,000	2,285,568
29	Mar 28, 2026 06:08	3,239	65,483,305	34,607,000	1,017,000	2,486,272
30	Mar 28, 2026 06:20	3,239	62,635,810	35,631,000	0	2,285,568
31	Mar 28, 2026 06:19	3,239	61,775,944	34,616,000	1,018,000	2,400,256
32	Mar 28, 2026 06:21	3,239	64,111,294	34,615,000	1,018,000	2,400,256
33	Mar 28, 2026 06:19	3,240	63,048,347	34,620,000	1,018,000	2,400,256
34	Mar 28, 2026 06:08	3,240	63,539,042	34,624,000	1,018,000	2,400,256
35	Mar 28, 2026 06:21	3,240	59,164,402	35,636,000	0	2,404,352
36	Mar 28, 2026 06:21	3,240	63,800,203	34,624,000	1,018,000	2,285,568
37	Mar 28, 2026 06:22	3,241	61,564,910	35,646,000	0	2,285,568
38	Mar 28, 2026 06:21	3,241	61,253,894	34,637,000	1,018,000	2,285,568
39	Mar 28, 2026 06:19	3,241	63,177,352	34,630,000	1,018,000	2,285,568
40	Mar 28, 2026 06:19	3,242	65,062,283	35,666,000	0	2,285,568
41	Mar 28, 2026 06:08	3,243	60,412,570	35,670,000	0	2,408,448
42	Mar 28, 2026 06:20	3,243	61,744,816	35,668,000	0	2,400,256
43	Mar 28, 2026 06:08	3,258	63,645,790	35,840,000	0	2,400,256
44	Mar 28, 2026 06:07	3,258	63,259,941	33,848,000	1,991,000	2,400,256
45	Mar 28, 2026 06:20	3,259	68,053,118	35,847,000	0	2,285,568

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