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| ID | Category | Severity | Reproducibility | Date Submitted | Last Update | ||||
| 0001382 | [Squeak] System | minor | always | 06-28-05 00:59 | 08-24-05 13:04 | ||||
| Reporter | chris | View Status | public | ||||||
| Assigned To | |||||||||
| Priority | normal | Resolution | fixed | ||||||
| Status | closed | Product Version | 3.8 | ||||||
| Summary | 0001382: 3.8 performance regression - ByteSymbol>>#hash | ||||||||
| Description |
Magma's peak commit rate in 3.8 dropped from 24 per second in 3.7 to 18 per second in 3.8. I traced the cause of this problem to ByteSymbol>>#hash. Because of the new String hierarchy to support Multi-byte Strings, it is no longer benefitting from the primitive for calculating its hash that used to be in String>>#stringHash:initialHash:. It was moved to ByteString but not to ByteSymbol so now, ByteSymbol is inheriting the slow one from String which, per the comment, works for WideStrings too. This fix simply restores the method with the primitive call that regular [Byte]Symbols have always benefitted from. |
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| Additional Information | |||||||||
| Attached Files |
 ByteSymbol class-stringHashinitialHash.st [^] (738 bytes) 06-28-05 00:59 SymbolPrims-ar.1.cs [^] (1,067 bytes) 08-19-05 00:00 |
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Notes |
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(0001742 - 15 - 15 - 15 - 15 - 15 - 15) MarcusDenker 07-12-05 19:46 |
fix is attached |
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(0001743 - 27 - 27 - 27 - 27 - 27 - 27) MarcusDenker 07-12-05 19:47 |
commited to 3.9a repository |
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(0002425 - 271 - 271 - 271 - 271 - 271 - 271) andreas 08-18-05 23:59 |
Reopened. The proposed fix is a needless duplication of code and only address one out of the four primitives affected. Attached is a change set that simply delegates all four primitives from ByteSymbol to ByteString therefore leaving the implementation in a single place. |
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(0002495 - 15 - 15 - 15 - 15 - 15 - 15) chris 08-23-05 04:48 |
Thanks Andreas. |
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(0002496 - 16 - 16 - 16 - 16 - 16 - 16) chris 08-23-05 04:52 |
Thanks Andreas.. |
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(0002520 - 12 - 12 - 12 - 12 - 12 - 12) MarcusDenker 08-24-05 13:01 |
added to 3.9 |
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Issue History |
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| Date Modified | Username | Field | Change |
| 06-28-05 00:59 | chris | New Issue | |
| 06-28-05 00:59 | chris | File Added: ByteSymbol class-stringHashinitialHash.st | |
| 06-28-05 01:01 | chris | Issue Monitored: chris | |
| 07-12-05 19:46 | MarcusDenker | Status | new => resolved |
| 07-12-05 19:46 | MarcusDenker | Resolution | open => fixed |
| 07-12-05 19:46 | MarcusDenker | Assigned To | => MarcusDenker |
| 07-12-05 19:46 | MarcusDenker | Note Added: 0001742 | |
| 07-12-05 19:46 | MarcusDenker | Assigned To | MarcusDenker => |
| 07-12-05 19:47 | MarcusDenker | Status | resolved => closed |
| 07-12-05 19:47 | MarcusDenker | Note Added: 0001743 | |
| 08-18-05 23:59 | andreas | Status | closed => feedback |
| 08-18-05 23:59 | andreas | Resolution | fixed => reopened |
| 08-18-05 23:59 | andreas | Note Added: 0002425 | |
| 08-19-05 00:00 | andreas | Resolution | reopened => fixed |
| 08-19-05 00:00 | andreas | File Added: SymbolPrims-ar.1.cs | |
| 08-23-05 04:48 | chris | Note Added: 0002495 | |
| 08-23-05 04:52 | chris | Note Added: 0002496 | |
| 08-24-05 13:01 | MarcusDenker | Status | feedback => closed |
| 08-24-05 13:01 | MarcusDenker | Note Added: 0002520 | |
| 08-24-05 13:04 | MarcusDenker | Fixed in Version | => 3.9 |
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