[jira] [Commented] (LUCENE-8574) ExpressionFunctionValues should cache per-hit value
[
https://issues.apache.org/jira/browse/LUCENE-8574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17154886#comment-17154886
]
ASF subversion and git services commented on LUCENE-8574:
-
Commit 1791d7e44278e9d032f99822e82b25109f8952c0 in lucene-solr's branch
refs/heads/branch_8x from Michael McCandless
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=1791d7e ]
LUCENE-8574: the DoubleValues for dependent bindings for an expression are now
cached and reused and no longer inefficiently recomputed per hit
> ExpressionFunctionValues should cache per-hit value
> ---
>
> Key: LUCENE-8574
> URL: https://issues.apache.org/jira/browse/LUCENE-8574
> Project: Lucene - Core
> Issue Type: Bug
>Affects Versions: 7.5, 8.0
>Reporter: Michael McCandless
>Assignee: Robert Muir
>Priority: Major
> Attachments: LUCENE-8574.patch, unit_test.patch
>
> Time Spent: 3h 10m
> Remaining Estimate: 0h
>
> The original version of {{ExpressionFunctionValues}} had a simple per-hit
> cache, so that nested expressions that reference the same common variable
> would compute the value for that variable the first time it was referenced
> and then use that cached value for all subsequent invocations, within one
> hit. I think it was accidentally removed in LUCENE-7609?
> This is quite important if you have non-trivial expressions that reference
> the same variable multiple times.
> E.g. if I have these expressions:
> {noformat}
> x = c + d
> c = b + 2
> d = b * 2{noformat}
> Then evaluating x should only cause b's value to be computed once (for a
> given hit), but today it's computed twice. The problem is combinatoric if b
> then references another variable multiple times, etc.
> I think to fix this we just need to restore the per-hit cache?
>
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[jira] [Commented] (LUCENE-8574) ExpressionFunctionValues should cache per-hit value
[
https://issues.apache.org/jira/browse/LUCENE-8574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17154878#comment-17154878
]
ASF subversion and git services commented on LUCENE-8574:
-
Commit 60e0d8ac6e512008d68770c358af8f057b03566d in lucene-solr's branch
refs/heads/master from Michael McCandless
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=60e0d8a ]
LUCENE-8574: the DoubleValues for dependent bindings for an expression are now
cached and reused and no longer inefficiently recomputed per hit
> ExpressionFunctionValues should cache per-hit value
> ---
>
> Key: LUCENE-8574
> URL: https://issues.apache.org/jira/browse/LUCENE-8574
> Project: Lucene - Core
> Issue Type: Bug
>Affects Versions: 7.5, 8.0
>Reporter: Michael McCandless
>Assignee: Robert Muir
>Priority: Major
> Attachments: LUCENE-8574.patch, unit_test.patch
>
> Time Spent: 3h 10m
> Remaining Estimate: 0h
>
> The original version of {{ExpressionFunctionValues}} had a simple per-hit
> cache, so that nested expressions that reference the same common variable
> would compute the value for that variable the first time it was referenced
> and then use that cached value for all subsequent invocations, within one
> hit. I think it was accidentally removed in LUCENE-7609?
> This is quite important if you have non-trivial expressions that reference
> the same variable multiple times.
> E.g. if I have these expressions:
> {noformat}
> x = c + d
> c = b + 2
> d = b * 2{noformat}
> Then evaluating x should only cause b's value to be computed once (for a
> given hit), but today it's computed twice. The problem is combinatoric if b
> then references another variable multiple times, etc.
> I think to fix this we just need to restore the per-hit cache?
>
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[jira] [Commented] (LUCENE-8574) ExpressionFunctionValues should cache per-hit value
[
https://issues.apache.org/jira/browse/LUCENE-8574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17152272#comment-17152272
]
Michael McCandless commented on LUCENE-8574:
Thanks [~zhai7631], the PR looks great, and now passes {{precommit}}. I'll
commit soon!
> ExpressionFunctionValues should cache per-hit value
> ---
>
> Key: LUCENE-8574
> URL: https://issues.apache.org/jira/browse/LUCENE-8574
> Project: Lucene - Core
> Issue Type: Bug
>Affects Versions: 7.5, 8.0
>Reporter: Michael McCandless
>Assignee: Robert Muir
>Priority: Major
> Attachments: LUCENE-8574.patch, unit_test.patch
>
> Time Spent: 3h 10m
> Remaining Estimate: 0h
>
> The original version of {{ExpressionFunctionValues}} had a simple per-hit
> cache, so that nested expressions that reference the same common variable
> would compute the value for that variable the first time it was referenced
> and then use that cached value for all subsequent invocations, within one
> hit. I think it was accidentally removed in LUCENE-7609?
> This is quite important if you have non-trivial expressions that reference
> the same variable multiple times.
> E.g. if I have these expressions:
> {noformat}
> x = c + d
> c = b + 2
> d = b * 2{noformat}
> Then evaluating x should only cause b's value to be computed once (for a
> given hit), but today it's computed twice. The problem is combinatoric if b
> then references another variable multiple times, etc.
> I think to fix this we just need to restore the per-hit cache?
>
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[jira] [Commented] (LUCENE-8574) ExpressionFunctionValues should cache per-hit value
[
https://issues.apache.org/jira/browse/LUCENE-8574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17152178#comment-17152178
]
Michael McCandless commented on LUCENE-8574:
Thanks [~zhai7631] I like that test case! Fibonacci should be simple
computation :)
I think the PR looks great. Since the pre-existing {{ArrayList}} issue is now
fixed we just need to rebase and let the tests run again.
> ExpressionFunctionValues should cache per-hit value
> ---
>
> Key: LUCENE-8574
> URL: https://issues.apache.org/jira/browse/LUCENE-8574
> Project: Lucene - Core
> Issue Type: Bug
>Affects Versions: 7.5, 8.0
>Reporter: Michael McCandless
>Assignee: Robert Muir
>Priority: Major
> Attachments: LUCENE-8574.patch, unit_test.patch
>
> Time Spent: 3h 10m
> Remaining Estimate: 0h
>
> The original version of {{ExpressionFunctionValues}} had a simple per-hit
> cache, so that nested expressions that reference the same common variable
> would compute the value for that variable the first time it was referenced
> and then use that cached value for all subsequent invocations, within one
> hit. I think it was accidentally removed in LUCENE-7609?
> This is quite important if you have non-trivial expressions that reference
> the same variable multiple times.
> E.g. if I have these expressions:
> {noformat}
> x = c + d
> c = b + 2
> d = b * 2{noformat}
> Then evaluating x should only cause b's value to be computed once (for a
> given hit), but today it's computed twice. The problem is combinatoric if b
> then references another variable multiple times, etc.
> I think to fix this we just need to restore the per-hit cache?
>
--
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[jira] [Commented] (LUCENE-8574) ExpressionFunctionValues should cache per-hit value
[
https://issues.apache.org/jira/browse/LUCENE-8574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17149623#comment-17149623
]
Haoyu Zhai commented on LUCENE-8574:
[~mikemccand] Yes it fixes the test case. Before the fix the test will cause
{{OutOfMemoryException}} and after the fix it finishes in a reasonable time
(like < 1s when I run it solely)
Thanks for reviewing that, I've addressed those comments!
> ExpressionFunctionValues should cache per-hit value
> ---
>
> Key: LUCENE-8574
> URL: https://issues.apache.org/jira/browse/LUCENE-8574
> Project: Lucene - Core
> Issue Type: Bug
>Affects Versions: 7.5, 8.0
>Reporter: Michael McCandless
>Assignee: Robert Muir
>Priority: Major
> Attachments: LUCENE-8574.patch, unit_test.patch
>
> Time Spent: 2h
> Remaining Estimate: 0h
>
> The original version of {{ExpressionFunctionValues}} had a simple per-hit
> cache, so that nested expressions that reference the same common variable
> would compute the value for that variable the first time it was referenced
> and then use that cached value for all subsequent invocations, within one
> hit. I think it was accidentally removed in LUCENE-7609?
> This is quite important if you have non-trivial expressions that reference
> the same variable multiple times.
> E.g. if I have these expressions:
> {noformat}
> x = c + d
> c = b + 2
> d = b * 2{noformat}
> Then evaluating x should only cause b's value to be computed once (for a
> given hit), but today it's computed twice. The problem is combinatoric if b
> then references another variable multiple times, etc.
> I think to fix this we just need to restore the per-hit cache?
>
--
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[jira] [Commented] (LUCENE-8574) ExpressionFunctionValues should cache per-hit value
[
https://issues.apache.org/jira/browse/LUCENE-8574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17148963#comment-17148963
]
Michael McCandless commented on LUCENE-8574:
[~zhai7631] does this fix your combinatoric adversarial test case
({{testFibonacciExpr}})?
I.e. before the fix, that test runs for way too long (days), but after, it runs
quickly?
I left some small comments on the PR. Thanks for tackling this!
> ExpressionFunctionValues should cache per-hit value
> ---
>
> Key: LUCENE-8574
> URL: https://issues.apache.org/jira/browse/LUCENE-8574
> Project: Lucene - Core
> Issue Type: Bug
>Affects Versions: 7.5, 8.0
>Reporter: Michael McCandless
>Assignee: Robert Muir
>Priority: Major
> Attachments: LUCENE-8574.patch, unit_test.patch
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> The original version of {{ExpressionFunctionValues}} had a simple per-hit
> cache, so that nested expressions that reference the same common variable
> would compute the value for that variable the first time it was referenced
> and then use that cached value for all subsequent invocations, within one
> hit. I think it was accidentally removed in LUCENE-7609?
> This is quite important if you have non-trivial expressions that reference
> the same variable multiple times.
> E.g. if I have these expressions:
> {noformat}
> x = c + d
> c = b + 2
> d = b * 2{noformat}
> Then evaluating x should only cause b's value to be computed once (for a
> given hit), but today it's computed twice. The problem is combinatoric if b
> then references another variable multiple times, etc.
> I think to fix this we just need to restore the per-hit cache?
>
--
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[jira] [Commented] (LUCENE-8574) ExpressionFunctionValues should cache per-hit value
[
https://issues.apache.org/jira/browse/LUCENE-8574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17145732#comment-17145732
]
Haoyu Zhai commented on LUCENE-8574:
Made a PR([https://github.com/apache/lucene-solr/pull/1613]) about this issue
Basically making a new DoubleValuesSource class which pass in `valueCache` to a
custom getValues to enforce only one DoubleValue per name along the whole
generation process.
> ExpressionFunctionValues should cache per-hit value
> ---
>
> Key: LUCENE-8574
> URL: https://issues.apache.org/jira/browse/LUCENE-8574
> Project: Lucene - Core
> Issue Type: Bug
>Affects Versions: 7.5, 8.0
>Reporter: Michael McCandless
>Assignee: Robert Muir
>Priority: Major
> Attachments: LUCENE-8574.patch, unit_test.patch
>
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> The original version of {{ExpressionFunctionValues}} had a simple per-hit
> cache, so that nested expressions that reference the same common variable
> would compute the value for that variable the first time it was referenced
> and then use that cached value for all subsequent invocations, within one
> hit. I think it was accidentally removed in LUCENE-7609?
> This is quite important if you have non-trivial expressions that reference
> the same variable multiple times.
> E.g. if I have these expressions:
> {noformat}
> x = c + d
> c = b + 2
> d = b * 2{noformat}
> Then evaluating x should only cause b's value to be computed once (for a
> given hit), but today it's computed twice. The problem is combinatoric if b
> then references another variable multiple times, etc.
> I think to fix this we just need to restore the per-hit cache?
>
--
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[jira] [Commented] (LUCENE-8574) ExpressionFunctionValues should cache per-hit value
[
https://issues.apache.org/jira/browse/LUCENE-8574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17139437#comment-17139437
]
Michael McCandless commented on LUCENE-8574:
{quote}please, lets keep the boolean and not bring NaN into this.
{quote}
+1
{quote}And it seems the patch attached to this issue could not handle it as
well (since DoubleValues generated for the same LeafReaderContext is not the
same, we still get tons of DoubleValues created).
{quote}
Hmm, good catch! So we somehow need to ensure that we use the same
{{DoubleValues}} instance per-segment per-binding? But how can we safely do
that, i.e. we can't know that this current caller will consume the same
{{DoubleValues}} in the same {{docid}} progression?
> ExpressionFunctionValues should cache per-hit value
> ---
>
> Key: LUCENE-8574
> URL: https://issues.apache.org/jira/browse/LUCENE-8574
> Project: Lucene - Core
> Issue Type: Bug
>Affects Versions: 7.5, 8.0
>Reporter: Michael McCandless
>Assignee: Robert Muir
>Priority: Major
> Attachments: LUCENE-8574.patch, unit_test.patch
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> The original version of {{ExpressionFunctionValues}} had a simple per-hit
> cache, so that nested expressions that reference the same common variable
> would compute the value for that variable the first time it was referenced
> and then use that cached value for all subsequent invocations, within one
> hit. I think it was accidentally removed in LUCENE-7609?
> This is quite important if you have non-trivial expressions that reference
> the same variable multiple times.
> E.g. if I have these expressions:
> {noformat}
> x = c + d
> c = b + 2
> d = b * 2{noformat}
> Then evaluating x should only cause b's value to be computed once (for a
> given hit), but today it's computed twice. The problem is combinatoric if b
> then references another variable multiple times, etc.
> I think to fix this we just need to restore the per-hit cache?
>
--
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[jira] [Commented] (LUCENE-8574) ExpressionFunctionValues should cache per-hit value
[
https://issues.apache.org/jira/browse/LUCENE-8574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17138710#comment-17138710
]
Haoyu Zhai commented on LUCENE-8574:
Ah, yes will use boolean instead of NaN. I'm just verifying whether the patch
works so quickly inserted few lines of code without much thinking.
But how should we fix this issue correctly? Since the easy fix patch seems not
solving the problem.
> ExpressionFunctionValues should cache per-hit value
> ---
>
> Key: LUCENE-8574
> URL: https://issues.apache.org/jira/browse/LUCENE-8574
> Project: Lucene - Core
> Issue Type: Bug
>Affects Versions: 7.5, 8.0
>Reporter: Michael McCandless
>Assignee: Robert Muir
>Priority: Major
> Attachments: LUCENE-8574.patch, unit_test.patch
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> The original version of {{ExpressionFunctionValues}} had a simple per-hit
> cache, so that nested expressions that reference the same common variable
> would compute the value for that variable the first time it was referenced
> and then use that cached value for all subsequent invocations, within one
> hit. I think it was accidentally removed in LUCENE-7609?
> This is quite important if you have non-trivial expressions that reference
> the same variable multiple times.
> E.g. if I have these expressions:
> {noformat}
> x = c + d
> c = b + 2
> d = b * 2{noformat}
> Then evaluating x should only cause b's value to be computed once (for a
> given hit), but today it's computed twice. The problem is combinatoric if b
> then references another variable multiple times, etc.
> I think to fix this we just need to restore the per-hit cache?
>
--
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[jira] [Commented] (LUCENE-8574) ExpressionFunctionValues should cache per-hit value
[
https://issues.apache.org/jira/browse/LUCENE-8574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17138277#comment-17138277
]
Robert Muir commented on LUCENE-8574:
-
please, lets keep the boolean and not bring NaN into this.
> ExpressionFunctionValues should cache per-hit value
> ---
>
> Key: LUCENE-8574
> URL: https://issues.apache.org/jira/browse/LUCENE-8574
> Project: Lucene - Core
> Issue Type: Bug
>Affects Versions: 7.5, 8.0
>Reporter: Michael McCandless
>Assignee: Robert Muir
>Priority: Major
> Attachments: LUCENE-8574.patch, unit_test.patch
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> The original version of {{ExpressionFunctionValues}} had a simple per-hit
> cache, so that nested expressions that reference the same common variable
> would compute the value for that variable the first time it was referenced
> and then use that cached value for all subsequent invocations, within one
> hit. I think it was accidentally removed in LUCENE-7609?
> This is quite important if you have non-trivial expressions that reference
> the same variable multiple times.
> E.g. if I have these expressions:
> {noformat}
> x = c + d
> c = b + 2
> d = b * 2{noformat}
> Then evaluating x should only cause b's value to be computed once (for a
> given hit), but today it's computed twice. The problem is combinatoric if b
> then references another variable multiple times, etc.
> I think to fix this we just need to restore the per-hit cache?
>
--
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[jira] [Commented] (LUCENE-8574) ExpressionFunctionValues should cache per-hit value
[
https://issues.apache.org/jira/browse/LUCENE-8574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17137920#comment-17137920
]
Haoyu Zhai commented on LUCENE-8574:
I've attached a unit test showing a case that current code could not handle.
And it seems the patch attached to this issue could not handle it as well
(since DoubleValues generated for the same LeafReaderContext is not the same,
we still get tons of DoubleValues created).
> ExpressionFunctionValues should cache per-hit value
> ---
>
> Key: LUCENE-8574
> URL: https://issues.apache.org/jira/browse/LUCENE-8574
> Project: Lucene - Core
> Issue Type: Bug
>Affects Versions: 7.5, 8.0
>Reporter: Michael McCandless
>Assignee: Robert Muir
>Priority: Major
> Attachments: LUCENE-8574.patch, unit_test.patch
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> The original version of {{ExpressionFunctionValues}} had a simple per-hit
> cache, so that nested expressions that reference the same common variable
> would compute the value for that variable the first time it was referenced
> and then use that cached value for all subsequent invocations, within one
> hit. I think it was accidentally removed in LUCENE-7609?
> This is quite important if you have non-trivial expressions that reference
> the same variable multiple times.
> E.g. if I have these expressions:
> {noformat}
> x = c + d
> c = b + 2
> d = b * 2{noformat}
> Then evaluating x should only cause b's value to be computed once (for a
> given hit), but today it's computed twice. The problem is combinatoric if b
> then references another variable multiple times, etc.
> I think to fix this we just need to restore the per-hit cache?
>
--
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[jira] [Commented] (LUCENE-8574) ExpressionFunctionValues should cache per-hit value
[
https://issues.apache.org/jira/browse/LUCENE-8574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17136136#comment-17136136
]
Haoyu Zhai commented on LUCENE-8574:
I've checked the current release and couldn't see this patch merged. And I
think there's no other changes introducing similar functionality (not so sure).
Probably we should merge this?
> ExpressionFunctionValues should cache per-hit value
> ---
>
> Key: LUCENE-8574
> URL: https://issues.apache.org/jira/browse/LUCENE-8574
> Project: Lucene - Core
> Issue Type: Bug
>Affects Versions: 7.5, 8.0
>Reporter: Michael McCandless
>Assignee: Robert Muir
>Priority: Major
> Attachments: LUCENE-8574.patch
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> The original version of {{ExpressionFunctionValues}} had a simple per-hit
> cache, so that nested expressions that reference the same common variable
> would compute the value for that variable the first time it was referenced
> and then use that cached value for all subsequent invocations, within one
> hit. I think it was accidentally removed in LUCENE-7609?
> This is quite important if you have non-trivial expressions that reference
> the same variable multiple times.
> E.g. if I have these expressions:
> {noformat}
> x = c + d
> c = b + 2
> d = b * 2{noformat}
> Then evaluating x should only cause b's value to be computed once (for a
> given hit), but today it's computed twice. The problem is combinatoric if b
> then references another variable multiple times, etc.
> I think to fix this we just need to restore the per-hit cache?
>
--
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[jira] [Commented] (LUCENE-8574) ExpressionFunctionValues should cache per-hit value
[
https://issues.apache.org/jira/browse/LUCENE-8574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17134323#comment-17134323
]
Haoyu Zhai commented on LUCENE-8574:
Sry, wrong commit message pointed to here, the correct issue should be
LUCENE-9391.
BTW, is this patch ever merged?
> ExpressionFunctionValues should cache per-hit value
> ---
>
> Key: LUCENE-8574
> URL: https://issues.apache.org/jira/browse/LUCENE-8574
> Project: Lucene - Core
> Issue Type: Bug
>Affects Versions: 7.5, 8.0
>Reporter: Michael McCandless
>Assignee: Robert Muir
>Priority: Major
> Attachments: LUCENE-8574.patch
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> The original version of {{ExpressionFunctionValues}} had a simple per-hit
> cache, so that nested expressions that reference the same common variable
> would compute the value for that variable the first time it was referenced
> and then use that cached value for all subsequent invocations, within one
> hit. I think it was accidentally removed in LUCENE-7609?
> This is quite important if you have non-trivial expressions that reference
> the same variable multiple times.
> E.g. if I have these expressions:
> {noformat}
> x = c + d
> c = b + 2
> d = b * 2{noformat}
> Then evaluating x should only cause b's value to be computed once (for a
> given hit), but today it's computed twice. The problem is combinatoric if b
> then references another variable multiple times, etc.
> I think to fix this we just need to restore the per-hit cache?
>
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[jira] [Commented] (LUCENE-8574) ExpressionFunctionValues should cache per-hit value
[
https://issues.apache.org/jira/browse/LUCENE-8574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17133940#comment-17133940
]
ASF subversion and git services commented on LUCENE-8574:
-
Commit 2991acf8fffe9dbeda20c24479b108bfb8ea9257 in lucene-solr's branch
refs/heads/master from Patrick Zhai
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=2991acf ]
LUCENE-9391: Upgrade HPPC to 0.8.2 (#1560)
* LUCENE-8574: Upgrade HPPC to 0.8.2 (Co-authored-by: Haoyu Zhai
)
> ExpressionFunctionValues should cache per-hit value
> ---
>
> Key: LUCENE-8574
> URL: https://issues.apache.org/jira/browse/LUCENE-8574
> Project: Lucene - Core
> Issue Type: Bug
>Affects Versions: 7.5, 8.0
>Reporter: Michael McCandless
>Assignee: Robert Muir
>Priority: Major
> Attachments: LUCENE-8574.patch
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> The original version of {{ExpressionFunctionValues}} had a simple per-hit
> cache, so that nested expressions that reference the same common variable
> would compute the value for that variable the first time it was referenced
> and then use that cached value for all subsequent invocations, within one
> hit. I think it was accidentally removed in LUCENE-7609?
> This is quite important if you have non-trivial expressions that reference
> the same variable multiple times.
> E.g. if I have these expressions:
> {noformat}
> x = c + d
> c = b + 2
> d = b * 2{noformat}
> Then evaluating x should only cause b's value to be computed once (for a
> given hit), but today it's computed twice. The problem is combinatoric if b
> then references another variable multiple times, etc.
> I think to fix this we just need to restore the per-hit cache?
>
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