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simdjson

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simdjson
Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, ...

C++ · 24262 stars

Beginner friendly Everything

Open All

Optional fields API for objects Open

on demand

Difficulty 5/5 Over a week Newbie friendliness 42/100

simdjson/simdjson#1230 · 2 comments · Opened Oct 14, 2020
Support get_c_str() in On Demand Open

enhancement on demand

Difficulty 3/5 1-2 days Newbie friendliness 35/100

simdjson/simdjson#1214 · 7 comments · 4 reactions · Opened Oct 6, 2020
Support parser.load() in On Demand Open

enhancement on demand

Difficulty 3/5 1-2 days Newbie friendliness 48/100

simdjson/simdjson#1212 · Opened Oct 6, 2020
[ondemand] Consider using default copy/destructors Open

performance unsubstantiated benefits/speculative

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#1184 · Opened Sep 22, 2020
Test locale independence Open

hygiene

Difficulty 3/5 1-2 days Newbie friendliness 35/100

simdjson/simdjson#1166 · Opened Sep 11, 2020
add support for CSV files Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#1136 · 13 comments · 6 reactions · Opened Aug 20, 2020
load_many should not load the whole file in memory Open

performance

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#1135 · 10 comments · Opened Aug 20, 2020
Use bitstack for depth array Open

performance research

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#1102 · 2 comments · Opened Aug 7, 2020
Swap key_value_pair for std::pair. Open

design issues enhancement

Difficulty 4/5 3-5 days Newbie friendliness 25/100

simdjson/simdjson#1098 · 11 comments · Opened Aug 6, 2020
Fallback code paths with "SIMD Everywhere" Open

good first issue help wanted performance platform coverage research

Difficulty 5/5 Over a week Newbie friendliness 30/100

simdjson/simdjson#1091 · 6 comments · Opened Aug 4, 2020
Change CMake build so that the kernels can be compiled in different units Open

performance unsubstantiated benefits/speculative

Difficulty 4/5 3-5 days Newbie friendliness 35/100

simdjson/simdjson#1061 · 2 comments · Opened Jul 23, 2020
Consider migrating CPU detection features to Google cpu_features (ARM runtime dispatch) Open

hygiene

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#1047 · 6 comments · Opened Jul 17, 2020
Make bash scripts work under Windows using cygpath or the equivalent Open

hygiene

Difficulty 3/5 1-2 days Newbie friendliness 35/100

simdjson/simdjson#1030 · 1 comment · Opened Jul 7, 2020
Using C-compatible POD types for better language interop Open

platform coverage

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#1024 · 1 comment · Opened Jul 5, 2020
Make it convenient to parse JSON from compressed inputs Open

performance

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#1020 · 12 comments · 2 reactions · Opened Jul 2, 2020
Number parsing debranchification possibilities Open

research

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#1019 · 8 comments · Opened Jul 2, 2020
Accept custom memory allocators (std::allocator) Open

good first issue

Difficulty 4/5 3-5 days Newbie friendliness 35/100

simdjson/simdjson#1017 · 18 comments · 2 reactions · Opened Jul 1, 2020
Provide a fast way of getting the path to an element, given the element Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#1003 · 1 reaction · Opened Jun 28, 2020
checkperf targets fail under Ninja Open

hygiene

Difficulty 4/5 3-5 days Newbie friendliness 25/100

simdjson/simdjson#982 · Opened Jun 24, 2020
Exposure to Raw Tape and Field Offset on Tape (Developer API) Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#951 · 4 comments · Opened Jun 20, 2020
Consider branchless homogenous arrays Open

performance research

Difficulty 5/5 Over a week Newbie friendliness 28/100

simdjson/simdjson#898 · 1 comment · Opened May 21, 2020
Consider compacting the string buffer Open

performance

Difficulty 5/5 Over a week Newbie friendliness 30/100

simdjson/simdjson#889 · 2 comments · Opened May 18, 2020
Store 32-bit integers and floats in one tape element Open

performance unsubstantiated benefits/speculative

Difficulty 5/5 Over a week Newbie friendliness 35/100

simdjson/simdjson#877 · 10 comments · Opened May 12, 2020
ClangCL simdjson 15% slower than Clang on WSL Open

performance platform coverage

Difficulty 4/5 3-5 days Newbie friendliness 25/100

simdjson/simdjson#848 · 6 comments · Opened May 1, 2020
Consider the application of the restrict keyword, especially for Visual Studio Open

performance

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#832 · Opened Apr 29, 2020
Speed up stage 1 index writing on MSVC Open

performance

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#831 · 1 comment · Opened Apr 29, 2020
Support for building json? Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#821 · 4 comments · Opened Apr 27, 2020
When building under Visual Studio via CMake, consider compiling the kernels with architecture flags Open

performance

simdjson/simdjson#811 · 4 comments · 1 assignee · Opened Apr 26, 2020
HACKING.md should be part of the main documentation Open

documentation

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

simdjson/simdjson#801 · 1 comment · Opened Apr 25, 2020
Discuss style convention Open

hygiene

Difficulty 5/5 Over a week Newbie friendliness 20/100

simdjson/simdjson#798 · 11 comments · Opened Apr 24, 2020
Speed Up CI Open

hygiene

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#796 · 1 comment · Opened Apr 24, 2020
Cirrus CI tests are super expensive due to image building Open

hygiene

Difficulty 4/5 3-5 days Newbie friendliness 35/100

simdjson/simdjson#771 · 3 comments · Opened Apr 23, 2020
Use custom-built docker images to speed CI Open

hygiene

Difficulty 4/5 3-5 days Newbie friendliness 35/100

simdjson/simdjson#757 · 8 comments · Opened Apr 21, 2020
C++20 issue with comparison operators Open

platform coverage

Difficulty 3/5 1-2 days Newbie friendliness 30/100

simdjson/simdjson#748 · 13 comments · Opened Apr 20, 2020
fuzz simdjson for correctness Open

test coverage

Difficulty 4/5 3-5 days Newbie friendliness 35/100

simdjson/simdjson#723 · 6 comments · Opened Apr 16, 2020
Publish the API for simdjson with exceptions disabled Open

documentation

Difficulty 4/5 3-5 days Newbie friendliness 25/100

simdjson/simdjson#709 · 5 comments · 2 reactions · Opened Apr 13, 2020
Document thread safety Open

documentation

Difficulty 3/5 1-2 days Newbie friendliness 35/100

simdjson/simdjson#681 · 1 comment · Opened Apr 4, 2020
Start from the result of the last key lookup when doing the next key lookup Open

performance

Difficulty 4/5 3-5 days Newbie friendliness 35/100

simdjson/simdjson#677 · 8 comments · Opened Apr 4, 2020
Add a difference_type for the array iterator Open

design issues

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

simdjson/simdjson#676 · 6 comments · Opened Apr 4, 2020
Scan input (stage 1) in fixed-size batches Open

performance research

Difficulty 5/5 Over a week Newbie friendliness 28/100

simdjson/simdjson#670 · 16 comments · 4 reactions · Opened Apr 2, 2020
Consider writing proper documentation using a proper framework Open

documentation hygiene

Difficulty 5/5 Over a week Newbie friendliness 20/100

simdjson/simdjson#595 · Opened Mar 23, 2020
Minor optimization opportunity (ARM NEON, minify) Open

performance platform coverage unsubstantiated benefits/speculative

Difficulty 4/5 3-5 days Newbie friendliness 42/100

simdjson/simdjson#571 · 5 comments · Opened Mar 20, 2020
parser.on_invalid_number Open

hygiene

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#560 · 2 comments · Opened Mar 15, 2020
Compile against downstream projects in ci Open

hygiene test coverage

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#548 · Opened Mar 9, 2020
When the compiler is C++20 compliant, consider using the bit header Open

performance unsubstantiated benefits/speculative

Difficulty 4/5 3-5 days Newbie friendliness 35/100

simdjson/simdjson#547 · Opened Mar 9, 2020
Amalgamated header is often out of date in master Open

hygiene

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#509 · 5 comments · Opened Feb 25, 2020
Add logging capability Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 20/100

simdjson/simdjson#506 · 1 comment · Opened Feb 22, 2020
Separate types and values in output Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 20/100

simdjson/simdjson#493 · 1 comment · Opened Feb 11, 2020
Consider using "self-aware" data structures to provide schema as a possible API Open

discussion help wanted

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#484 · 2 comments · Opened Feb 5, 2020
Don't copy unescaped strings Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

simdjson/simdjson#474 · 2 comments · Opened Jan 31, 2020

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