New DecimalFormat vs. old on 10 aug 2015
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ABCDEFGHIJKLMNOPQRSTUVWXYZAA
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Task
New NumberFormat code (ns)
Old NumberFormat code (ns)
% improvement
Times fasterNotes
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Creation from a raw pattern string (no caching)117001440018.75%1.230769231
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Format small int (31) using format(int, UErrorCode)330120072.50%3.636363636
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Format 2.99792458E8 with 0.00000E04570560018.39%1.225382932
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Format 4.6692016 with 0.00000002480345028.12%1.391129032
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Format 2.1 with 0.00000001120345067.54%3.080357143
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Format 3.0 with 0.00000001050345069.57%3.285714286
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Format 2.01 with 0.00000002500345027.54%1.382.01 is often problematic for rounding, so does not use the fastpath
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Format 1234567.8901 with 0.00000003650475023.16%1.301369863
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Format "23.0 degrees Celsius" with MeasureFormat1800525065.71%2.916666667
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Format "23 degrees Celsius" with MeasureFormat1850215013.95%1.162162162
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Message Formatting: I have 1 friend; I have 3 friends.30502400-27.08%0.7868852459the slight performance hit here is likely in the fast track checking.
The new code has to call isZero() on DigitLists whereas
the old code checked if a pointer was NULL.
We can revisit if needed. Maybe add an isZero
boolean flag along side the DigitLists?
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Message Formatting: I have 1.0 friend; I have 3.0 friends.3500540035.19%1.542857143
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Converting 1234567 to DigitList300
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Converting 1234567.8901 to DigitList1300
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10 aug with VisibleDigits
memory