A new RcppSimdJson release with updated upstream simdjson code just arrived on CRAN. RcppSimdJson wraps the fantastic and genuinely impressive simdjson library by Daniel Lemire and collaborators. Via some very clever algorithmic engineering to obtain largely branch-free code, coupled with modern C++ and newer compiler instructions, it results in parsing gigabytes of JSON parsed per second which is quite mindboggling. The best-case performance is ‘faster than CPU speed’ as use of parallel SIMD instructions and careful branch avoidance can lead to less than one cpu cycle use per byte parsed; see the video of the recent talk by Daniel Lemire at QCon (which was also voted best talk).
This release brings updated upstream code (thanks to Brendan Knapp) plus a new example and minimal tweaks. The full NEWS entry follows.
Changes in version 0.0.5 (2020-05-23)