-
InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I love these kinds of things and use them in GPU programming, among other things. Things have changed in a variety of ways: population count and count-trailing-zeros are generally available as fast instructions now. Multiply is also now just as fast as other operations, so is not to be avoided.
A couple examples. [1] computes the sum of the number of bytes used of four consecutive segments of a bezier path - each segment can be lineto, quadto, or curveto, can be the end of a path or not, and be i16 or f32. 4 tag bytes are packed into a 32 bit word, it computes all these, then sums them together.
[2] linearizes a recursive subdivision into an iterative loop. The stack depth is represented as the number of zeros in a word, so pushing the stack is a left shift, and popping is a right shift. It turns out you want to pop multiple levels at once, and the number of levels is computed by countTrailingZeros. ([2] is experimental Rust code, but I will adapt this into a compute shader)
[1]: https://github.com/linebender/piet-gpu/blob/main/piet-wgsl/s...
[2]: https://github.com/linebender/kurbo/blob/euler/src/euler.rs#...
I love these kinds of things and use them in GPU programming, among other things. Things have changed in a variety of ways: population count and count-trailing-zeros are generally available as fast instructions now. Multiply is also now just as fast as other operations, so is not to be avoided.
A couple examples. [1] computes the sum of the number of bytes used of four consecutive segments of a bezier path - each segment can be lineto, quadto, or curveto, can be the end of a path or not, and be i16 or f32. 4 tag bytes are packed into a 32 bit word, it computes all these, then sums them together.
[2] linearizes a recursive subdivision into an iterative loop. The stack depth is represented as the number of zeros in a word, so pushing the stack is a left shift, and popping is a right shift. It turns out you want to pop multiple levels at once, and the number of levels is computed by countTrailingZeros. ([2] is experimental Rust code, but I will adapt this into a compute shader)
[1]: https://github.com/linebender/piet-gpu/blob/main/piet-wgsl/s...
[2]: https://github.com/linebender/kurbo/blob/euler/src/euler.rs#...