# Release 2.9.0

## Breaking Changes

*   Due to security issues in TF 2.8, all boosted trees code has now been removed (after being deprecated in TF 2.8). Users should switch to [TensorFlow Decision Forests](https://github.com/tensorflow/decision-forests).
*   Build, Compilation and Packaging

//go:norace functions - specifically, those that inline add, addMulVVW, // assign, cmpGeq, rshift1, and sub. // choice represents a constant-time boolean. The value of choice is always // either 1 or 0. We use an int instead of bool in order to make decisions in // constant time by turning it into a mask. type choice uint func not(c choice) choice { return 1 ^ c } const yes = choice(1) const no = choice(0) // ctMask is all 1s if on is yes, and all 0s otherwise. func ctMask(on choice) uint { return -uint(on)...

//go:norace functions - specifically, those that inline add, addMulVVW, // assign, cmpGeq, rshift1, and sub. // choice represents a constant-time boolean. The value of choice is always // either 1 or 0. We use an int instead of bool in order to make decisions in // constant time by turning it into a mask. type choice uint func not(c choice) choice { return 1 ^ c } const yes = choice(1) const no = choice(0) // ctMask is all 1s if on is yes, and all 0s otherwise. func ctMask(on choice) uint { return -uint(on)...