Instead of using `%` to compute the index into an oblist, use a power
of 2 for the oblist length and bit masking to compute an index. (Maybe
the old hashing function was bad; the current hashing function should
produce good hash-code variation at the level of bits.) Also, make the
oblist array a little sparser to reduce bucket chaining.
original commit: fb87fcb8e47902b80654789d059a25bd4a7a8def
After a bignum computation using temporary thread registers W, U, or V
is complete, clear ther register. (The X and Y registers hold only
small bignums, so clearing them doesn't matter in the same way.)
original commit: a9e11fcf9e86aee5d149764476e1fabfeee12f84
Try `fxquotient` with a `fx*` check to implement `/` on fixnums.
That's fast enough to be much faster when it works, and only slows
down a more general `/` a little.
original commit: e91430be9b71f4913965db688a15f6d7206b38f3
It's not available with musl, either, musl intentionally
doesn't provide a preprocessor test, and we're avoiding
(for now) `configure`-time tests in the style of autoconf.
original commit: a9bfb72027fc83ed6bb690d033bc6fed0629dba7
Don't run cptypes, when cp0 is disabled, for example with
(run-cp0 (lamba (cp0 x) x)
This is easier to understand because run-cp0 is a single point to control
all the cp reductions. The reductions in cptypes can be independently disable
using enable-type-recovery.
original commit: b23645e669fbf02806a261a2d87160fdbe06db93
Use the high bit of a byte to continue instead of the low bit.
That way, ASCII strings look like themselves in uncompressed fasl
form.
original commit: 89a8d24cc051123a7b2b6818c5c4aef144d48797
Uninterned symbols are slightly more expensive to allocate than 0- or
1-argument calls to `gensym`, but they're much cheaper to hash (and
print). They're also more consistently distinct when unfasled, and the
fasled form is determinsitic.
original commit: 3167083008031b1f880e76a6f573563c7d9c888c
The result of `mktime` is -1 for an error. The result is also -1 if
the time is 1 second before the epoch. That's not useful, so ignore
it.
original commit: aa8ca31cef223128fd8ed1abdc76beb31a0e077a
With this flag the primitive is not tested in primvars.ms but other
parts of the compiler can use the signature/flags.
Also, add a signature to every system boolean primitive.
primvars.ms, primdata.ss
original commit: ee023c673bda6557bc223de7f8b0e732600619bc
Probably makes no difference right now, since these internal functons
rarely show up in the process of optimizing user programs, but just in
case.
original commit: b54a288b31731368dbcf57c95b78f0a162c29147
Can't simply use a continuation reified by an attachment
operation, because it is probably a 1-shot continuation
that needs to be promoted.
original commit: 8201aff06df8011ffbc41f217d50e4c430d75bb5
Effectively, change a `call/cc` call to `let/cc` when it appears in
the tail position of a function. This change takes advantage of
continuation-reification support that was built for continuation
attachments.
original commit: 4c015a5b55f7d04839a0efd8e5554fc237e4663b
The MRG32k3a generator is fast when using unboxed floating-point
arithemtic. Since the Scheme compiler doesn't yet support that,
build MRG32k3a into the kernel and provide access via
`pseudo-random-generator` functions.
original commit: 3dd74679a6c2705440488d8c07c47852eb50a94b
If normal 1-shot continuations are mixed with opportunistic 1-shot
continuations created by `call-setting-continuation-attachment`, then
promoting an opportunistic 1-shot at a GC is wrong unless the whole
chain is promoted.
original commit: 2dfac475666763b60935e382386af4438f3029e0
Include an extra part in the Chez Scheme version number, which both
helps indicates the Racket fork and versions it.
original commit: 00678e29bb9f05de2ccaec8585126e967cdcc6f4
Also, rename `call-with-current-continuation-attachment` to
`call-getting-continuation-attachment`.
original commit: e2a00e6d641b92918c4911c27ba14949748fd291
Add a shortcut check when refiying the continuation frame in tail
position, which is significantly cheaper when the frame is already
there. We pay down the check by skipping an attachment-lists check
that is not needed if the frame is newly reified.
Aslo, add a one-shot continuation-frame cache, which makes a shallow
temporary attachment cheaper, as in
(let loop ([i N])
(if (zero? i)
0
(loop (call-setting-continuation-attachment
i
(lambda ()
(f (sub1 i)))))))
The cache is just one frame. Keeping a chain of allocated-by-not-GCed
frames doesn't pay off.
Meanwhile, remove the leftover `$shift-attachment` library entry.
original commit: 1f454f536b1d7efe20fe9e793cda31e54e31e5f4
Weak pairs, ephemeron pairs, some symbols, and some ports were handled
incorerctly when locked multiple times.
original commit: 847fc1c84496f67cd363c8411d0023339f4d6246
The `unlock-object` operation was O(N) with N currently locked objects
--- so, O(N^2) to lock N objects and then unlock them --- because
locked objects were stored in and searched in a global list. Also, GC
was O(N) at any generation with N locked objects across generations,
since every locked object was scanned.
Fix these poblems so that locking and unlocking is practically O(1)
and GC is not poportional to locked objects. More precisely, locking
and unlocking is now O(C) for locking an individual object C times to
be balanced by C unlocks. (Since multiple locks on a single object
is rare, this performance seems good enough.)
The implementation replaces the global list with segment-specific
lists. Backpointers are managed using the general generational
support, so that unmodified, old-generation locked objects do not
need to be swept duing a new-generation collection.
original commit: a57d256ca73a3d507792c471facb7e35afbe88b3
... and eq-hashtable-cell and symbol-hashtable-ref-cell,
which are just like hashtable-cell, except that if the given
key isn't present, they return #f instead of mutating the table.
original commit: c1ab89fc2152ba41f50c0a5b0e5857fc48fc63c1
p is a pointer that iterates over path, which is buffer.
We should not try to get to an address preceding its start.
Since there was an execution path that leads to that,
guard against it with an additional check.
Signed-off-by: Alexander Shopov <ash@kambanaria.org>
original commit: de8d0e742f44c80735a682bd05019246c2087d56
