148 lines
4.9 KiB
Markdown
148 lines
4.9 KiB
Markdown
TAME Release Notes
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==================
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This file contains notes for each release of TAME since v17.4.0.
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TAME uses [semantic versioning][]. Any major version number increment
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indicates that backwards-incompatible changes have been introduced in that
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version. Each such version will be accompanied by notes that provide a
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migration path to resolve incompatibilities.
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[semantic versioning]: https://semver.org/
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TAME developers: Add new changes under a "NEXT" heading as part of the
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commits that introduce the changes. To make a new release, run
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`tools/mkrelease`, which will handle updating the heading for you.
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NEXT
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====
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Miscellaneous
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-------------
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- `package-lock.json` additions.
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v17.6.0 (2020-08-19)
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====================
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This release provides a new environment variable for JVM tuning. It does
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not provide any new compiler features or performance enhancements in itself,
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though it enables optimizations through JVM tuning.
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Compiler
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--------
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- The new environment variable `TAMED_JAVA_OPTS` can now be used to provide
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arguments to the JVM. This feature was added to support heap ratio
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tuning.
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Miscellaneous
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-------------
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- `build-aux/lsimports` was causing Gawk to complain about the third
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argument to `gensub`; fixed.
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- `bootstrap` will test explicitly whether `hoxsl` is a symbol link, since
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`-e` fails if the symlink is broken.
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v17.5.0 (2020-07-15)
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====================
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This release adds support for experimental human-guided tail call
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optimizations (TCO) to resolve issues of stack exhaustion during runtime for
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tables with a large number of rows after having applied the first
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predicate. This feature should not be used outside of `tame-core`, and will
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be done automatically by TAMER in the future.
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`tame-core`
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-----------
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- `vector/filter/mrange`, used by the table lookup system, has had its
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mutually recursive function inlined and now uses TCO.
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- This was the source of stack exhaustion on tables whose predicates were
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unable to filter rows sufficiently.
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Compiler
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--------
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- Experimental guided tail call optimizations (TCO) added to XSLT-based
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compiler, allowing a human to manually indicate recursive calls in tail
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position.
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- This is undocumented and should only be used by `tame-core`. The
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experimental warning will be removed in future releases if the behavior
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proves to be sound.
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- TAMER will add support for proper tail calls that will be detected
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automatically.
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v17.4.3 (2020-07-02)
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====================
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This release fixes a bug caused by previous refactoring that caused
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unresolved externs to produce an obscure and useless error for the end
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user.
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Linker
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------
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- Provide useful error for unresolved identifiers.
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- This was previously falling through to an `unreachable!` block,
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producing a very opaque and useless internal error message.
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v17.4.2 (2020-05-13)
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====================
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This release adds GraphML output for linked objects to allow us to
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inspect the graph.
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Linker
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------
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- Add `--emit` oprion to `tamer/src/bin/tameld.rs` that allows us to specify
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the type of output we want.
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- Minor refactoring.
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Miscellaneous
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-------------
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- Added `make` target to build linked GraphML files.
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- Updated `make *.xmle` target to explicitly state it is emitting `xmle`.
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- Added Cypher script to use in Neo4J after a GraphML file is imported.
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- `RELEASES.md`
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- Add missing link to semver.org.
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- Fix `tame-core` heading, which was erroneously Org-mode-styled.
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- Rephrase and correct formatting of an introduction paragraph.
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v17.4.1 (2020-04-29)
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====================
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This release refactors the linker, adds additional tests, and improves
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errors slightly. There are otherwise no functional changes.
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Compiler
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--------
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- Refactor proof-of-concept dependency graph construction code.
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- Improvements to error abstraction which will later aid in reporting.
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Miscellaneous
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-------------
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- `RELEASES.md` added.
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- `tools/mkrelease` added to help automate updating `RELEASES.md`.
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- `build-aux/release-check` added to check releases.
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- This is invoked both by `tools/mkrelease` and by CI via
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`.gitlab-ci.yml` on tags.
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v17.4.0 (2020-04-17)
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====================
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This release focuses on moving some code out of the existing XSLT-based
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compiler so that the functionality does not need to be re-implemented in
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TAMER. There are no user-facing changes aside form the introduction of two
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new templates, which are not yet expected to be used directly.
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`tame-core`
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-----------
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- New `rate-each` template to replace XSLT template in compiler.
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- New `yields` template to replace XSLT template in compiler.
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- Users should continue to use `rate-each` and `yields` as before rather
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than invoking the new templates directly.
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- The intent is to remove the `t` namespace prefix in the future so that
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templates will be applied automatically.
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Compiler
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--------
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- XSLT-based compiler now emits `t:rate-each` in place of the previous XSLT
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template.
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- XSLT-based compiler now emits `t:yields` in place of the previous XSLT
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template.
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