FogBugz (Case [Issue]10436) Kernel - Fast-up mixed Integer Fraction sum and difference

A FogBugz case was edited by Nicolas Cellier.

Case ID:      10436
Title:        Fast-up mixed Integer Fraction sum and difference
Status:       Work Needed
Category:     Bug
Project:      Kernel
Area:         Misc
Priority:     6 - Fix If Time
Milestone:    Pharo3.0: 30/03/2014
Assigned To:  Everyone

URL:          https://pharo.fogbugz.com/default.asp?10436

Like in Squeak, when we add/subtract a fraction and an integer, there's no point in checking for simplification of numerator/denominator.

This small refactoring has interesting micro benchmarks:

Large operands:

f := Float pi asFraction.
i := SmallInteger maxVal squared.
{
[ i + f ] bench.
[ f + i ] bench.
}
BEFORE: #('90,400 per second.' '88,100 per second.')
AFTER:  #('557,000 per second.' '596,000 per second.')

Small operands:

f := 3/7.
i := 5.
{
[ i + f ] bench.
[ f + i ] bench.
}

BEFORE: #('1,000,000 per second.' '3,600,000 per second.')
AFTER:  #('6,030,000 per second.' '6,430,000 per second.')


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