Resize bicubic op #59
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Merge branch 'master' into resizeBicubicOP
Mark calls to the `op()` function that creates the exported op as pure by using [`/* @__PURE__ */` annotations](https://esbuild.github.io/api/#ignore-annotations) (this also works for Rollup, but I can't find the docs). This comment instructs bundlers that the function call has no side-effects, so it can be removed if the result is not used. This is okay for the `op` function because, although it references ENGINE, it does so [in a closure](https://github.com/tensorflow/tfjs/blob/master/tfjs-core/src/ops/operation.ts#L48-L61) that it never calls, so while its return value may cause side effects when called, it itself does not. This has no immediate effect because we still maintain a list of `sideEffects` in the package.json, but it is a step towards removing that list. Co-authored-by: Linchenn <[email protected]>
This update includes new lock files for pypi packages that make sure their versions don't change between builds. These lock files can be generated with the update_locked_deps.sh script. As part of this update, the PR pins flax to 0.6.2. Additionally, python dependencies will only be fetched when a build requires them, so first time javascript-only builds should see a speedup.
Optimizers are currently registered in the same file they are defined in, which is a side effect. This would make it impossible to tree-shake them in a custom bundle when `sideEffects` is removed from the package.json. This PR moves Optimizer registration to the `register_optimizers.ts` file. The files that the Optimizers are defined in no longer have side effects. To exclude Optimizers from a custom bundle, the `registerOptimizers` function is called from `index.ts`. Custom bundles replace `index.ts` with a different file that does not call this function.
`train.ts` exports optimizers by copying them from the `OptimizerConstructors` class onto a `train` object. This is unnecessary because the `OptimizerConstructors` class constructor is a subtype of the `train` object's type (i.e. it has all the properties that `train` has). Instead of creating a new `train` object, this PR re-exports `OptimizerConstructors` as `train`. This has no direct effect now, but if / when re remove the `sideEffects` field from `package.json`, it helps some bundlers (esbuild) do tree-shaking.
Each `Optimizer` lists its class name as a static property of the class so it can be serialized and deserialized. This prevents the class from being tree-shaken because bundlers will compile it like this:
```
class SomeOptimizer {
...
}
// The bundler can not remove this assignment because
// SomeOptimizer.className could be a setter with a side effect.
SomeOptimizer.className = 'SomeOptimizer';
```
This PR uses a static getter for the class name instead, which bundlers can tree-shake properly.
Merge branch 'master' into resizeBicubicOP
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