Process for sorting large lists on a 64-bit computing platform
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United States of America Patent
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Issued Date -
May 3, 2007
app pub date -
Nov 1, 2005
filing date -
Nov 1, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A process for sorting large files or structures is disclosed where improved performance is achieved by reducing the work involved and the time required to do record key comparisons. The reduction is achieved by transposing and saving the key data from each record into a representative form that can be more quickly compared each time the key comparison is required. In addition the process uses pointers to avoid the processing time to exchange records larger than one word in memory. The representation of the key data is optimized and aligned for comparison by word based computer instructions which are typically faster than byte based instructions. The process is optimized for word sizes and instructions which handle words larger than four bytes and in particular for machines and instructions with 64-bit or larger word sizes such as the Intel Itanium series processors.
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