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Add BC performance knowledge from OptimAL learnings (#198)

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* Add BC performance knowledge from OptimAL learnings

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

* Address review feedback on performance guidance

Clarify predicate-supporting keys versus covering queries, demonstrate proven cache reuse, and evaluate the updated partial-load and bulk-update rules.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Jesper Schulz-Wedde <jesper.schulzwedde@microsoft.com>
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
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Jesper Schulz-Wedde 2026-09-29 17:21:28 +02:00 • committed by GitHub
parent 56ce52a9c7
commit 87ba36e650
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37 changed files with 920 additions and 37 deletions
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7
microsoft/knowledge/performance/calcsums-instead-of-calcfields-in-loop.bad.al
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@ -1,15 +1,14 @@
codeunit 50223 "Perf Sample CalcSums Bad"
{
procedure TotalRemaining(CustomerNo: Code[20]) Total: Decimal
procedure TotalSales(CustomerNo: Code[20]) Total: Decimal
var
CustLedgerEntry: Record "Cust. Ledger Entry";
begin
CustLedgerEntry.SetCurrentKey("Customer No.");
CustLedgerEntry.SetRange("Customer No.", CustomerNo);
// One SQL query per row over a 10M-row ledger.
if CustLedgerEntry.FindSet() then
repeat
CustLedgerEntry.CalcFields("Remaining Amount");
Total += CustLedgerEntry."Remaining Amount";
Total += CustLedgerEntry."Sales (LCY)";
until CustLedgerEntry.Next() = 0;
end;
}