Last change
on this file since 2b6db03 was
44856ed,
checked in by Michael Brooks <mlbrooks@…>, 3 years ago
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Baseline "new" vector, with iterators.
Implementation has not had thorough correctness testing, e.g. checking wraparound
behaviours, and at least one such case is commented as unimplemented.
Implementation has not been optimized at the instruction path level, though a basic
iteration performance check has it within 5% of c++ std::vector.
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-
Property mode set to
100644
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File size:
1.1 KB
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1 | #include "vector2.hfa" |
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2 | |
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3 | #include <time.h> |
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4 | |
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5 | enum { NumElements = 10000, NumReps = 50000 }; |
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6 | |
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7 | // A layer of indirection to improve performance (naturally!) |
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8 | // Works around trac #248. |
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9 | // This test keeps a vector of notfloat, instead of a vector of float. The optimizer removes this added indirection. |
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10 | // Furthermore, by passing notfloat's static-inline constructors, defined in this compile unit, to vector, the vector's element's constructors become eligible for inlining. |
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11 | // Skipping this optimization costs about a 25% slowdown. |
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12 | struct notfloat{ inline float; }; |
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13 | |
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14 | int main() { |
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15 | clock_t start, end; |
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16 | vector(notfloat) x = { 4 }; |
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17 | for (i; NumElements) { |
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18 | push_last(x, (notfloat){0.1f * i}); |
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19 | } |
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20 | float total; |
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21 | start = clock(); |
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22 | for (rep; NumReps) { |
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23 | total = 0; |
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24 | while( vector_exit(notfloat) it = x`origin; it`moveNext ) { |
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25 | total += it`val; |
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26 | } |
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27 | } |
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28 | end = clock(); |
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29 | printf("last total was %f\n", total); |
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30 | double elapsed = ((double) (end - start)) / CLOCKS_PER_SEC; \ |
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31 | printf("iterating duration was %f\n", elapsed); |
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32 | } |
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