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Update NEWS for 2.9.3

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* NEWS: Update.
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Andy Wingo 2019-07-29 10:49:39 +02:00
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commit cbacc7782b
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34
NEWS
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@ -6,33 +6,21 @@ Please send Guile bug reports to bug-guile@gnu.org.
Changes in alpha 2.9.2 (since alpha 2.9.1):
Changes in alpha 2.9.3 (since alpha 2.9.2):
* Notable changes
** Just-in-time code generation support on ARMv7, ia32, AArch64
** Improved just-in-time machine code generation
This release adds just-in-time (JIT) native code generation for the
ia32, ARMv7, and AArch64 platforms, in addition to the x86-64 support
already present in 2.9.1.
** Cheaper just-in-time code generation
Guile now includes a forked version of GNU Lightning. This "Lightening"
effort, spun out as a separate project, aims to build on the back-end
support from GNU Lightning, but adapting the API and behavior of the
library to match Guile's needs.
One of the important points that this project fixes is run-time
overhead. With the adoption of Lightening, Guile has lowered its
thresholds for when to generate native code at run-time, so that user
programs run faster, sooner.
For more information, see https://gitlab.com/wingo/lightening.
Guile's JIT compiler emits better code for indirect procedure calls,
atomic instructions, numeric comparisons, procedure prologues,
well-known closures with no free variables, calls and returns, and
allocations. Together these improvements can speed up some benchmarks
by up to 50%.
Changes in alpha 2.9.1 (since the stable 2.2 series):
Changes in alpha 2.9.x (since the stable 2.2 series):
* Notable changes
@ -49,10 +37,8 @@ JIT compilation, configure Guile with `--enable-jit=no' or
`--disable-jit'. The default is `--enable-jit=auto', which enables the
JIT if it is available. See `./configure --help' for more.
In this release, JIT compilation is enabled only on x86-64. In future
prereleases support will be added for all architectures supported by GNU
lightning. Intrepid users on other platforms can try passing
`--enable-jit=yes' to see the state of JIT on their platform.
JIT compilation is enabled by default on x86-64, i686, ARMv7, and
AArch64 targets.
** Lower-level bytecode