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Last change
on this file since 5f917740 was 44856ed, checked in by Michael Brooks <mlbrooks@…>, 4 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:
689 bytes
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| 1 | #include <vector>
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| 2 | #include <iostream>
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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 | int main() {
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| 8 | clock_t start, end;
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| 9 | std::vector<float> x;
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| 10 | for (int i = 0; i < NumElements; i++) {
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| 11 | x.push_back(0.1f * i);
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| 12 | }
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| 13 | float total;
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| 14 | start = clock();
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| 15 | for (int rep = 0; rep < NumReps; rep++) {
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| 16 | total = 0;
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| 17 | for( std::vector<float>::iterator it = x.begin(); it < x.end(); it ++ ) {
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| 18 | total += *it;
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| 19 | }
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| 20 | }
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| 21 | end = clock();
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| 22 | std::cout << "last total was " << total << std::endl;
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| 23 | double elapsed = ((double) (end - start)) / CLOCKS_PER_SEC; \
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| 24 | std::cout << "iterating duration was " << elapsed << std::endl;
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| 25 | }
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