Differences between revisions 8 and 38 (spanning 30 versions)

Results for Exercise Sheet 3 (Intersecting Lists)

Add your row to the table below, following the examples already there. In the 1st column, write your account name, or name1+name2 if you work in a group. For each intersection result, write down (1) the runtime of the baseline algorithm, (2) the runtime of your improved algorithm (both in microseconds as an integer) and (3) the speedup ratio as float with exactly two digits of precision, measured as time_for_baseline / time_for_your_algorithm (<1 = slower, >1 = faster). In the last column briefly describe the improvements you implemented.

film + bowling

film + rug

bowling + rug

Name

Baseline

Yours

Ratio

Baseline

Yours

Ratio

Baseline

Yours

Ratio

Language

Summary Improvements

ck1028

12920µs

8796µs

1.46

8570µs

3298µs

2.59

545µs

520µs

1.05

Java

Combination of zipper algorithm & binary search in remainder of longer list; sentinels.

ck1028

1898µs

1784µs

1.06

1767µs

260µs

6.79

116µs

65µs

1.78

C++

Combination of zipper algorithm & galloping search; sentinels.

he41

8184µs

1465µs

5.59

8957µs

1446µs

6.19

2631µs

1575µs

1.67

Java

Combination of zipper algorithm & galloping search; sentinels; Bitwise Operations.

ma269

1901µs

1538µs

1.24

1332µs

566µs

2.35

122µs

52µs

2.32

C++

Log(n)-step baseline or galloping search with sentinels.

cb382 + mz111

4842µs

2992µs

1.62

5428µs

1487µs

3.65

1687µs

803µs

2.10

Java

Combination of zipper with sentinels & galloping search

yl100

2061µs

1943µs

1.06

1381µs

483µs

2.86

141µs

66µs

2.14

C++

Combination of zipper ,sentinels, and galloping search

fk234

2127µs

1670µs

1.27

1896

466

4.07

146µs

91µs

1.60

C++

Zipper algorithm with sentinels and galloping search

pk104

1514µs

1318µs

1.14

1293

355

3.65

95µs

50µs

1.87

C++

galloping search

pg152

17024µs

11518µs

1.47

12301µs

3078µs

3.99

4777µs

1334µs

3.58

Java

Binsearch at beginning, Galloping at end

dd74

1785µs

1951µs

0.91

1631µs

575µs

2,84

144µs

143µs

1.01

C++

Zipper algorithm with sentinels, binary search

je113

2049µs

1872µs

1.09

1124µs

497µs

2,26

90µs

89µs

1.01

Java

Skip pointers with sentinels

ck407

30959µs

28967µs

1.07

2102µs

1168µs

1.80

1447µs

1098µs

1.32

Java

Combination of zipper with sentinels and galloping search.

sm362

1854µs

1831µs

1.01

1549µs

432µs

3.58

127µs

81µs

1.57

C++

Combination of zipper algorithm & galloping search

ak745

6292µs

5245µs

1.20

6060µs

1026µs

5.91

1893µs

790µs

2.40

Java

Combination of Galloping search and binary search.

yb36

1443µs

1271µs

1.14

1374µs

227µs

6.03

133µs

38µs

3.47

C++

Zipper + Galloping search + Binary search + Sentinels

-  ⇤ ← Revision 8 as of 2017-11-02 09:45:36 → 
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  Editor: Claudius Korzen
  Comment:
+   ← Revision 38 as of 2017-11-12 19:19:43 → ⇥
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+Additions are marked like this.
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+#acl All:read,write
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-Add your row to the table below, following the examples already there. In the 1st column, write your account name, or name1+name2 if you work in a group.
In the 2nd and 3rd column, write down the average runtime of the baseline algorithm and of your improved algorithm on your machine, in '''micro'''seconds as an integer.
As mentioned in the lecture, repeat each measurement '''5 times''' and take the average.
In the columns 4-6, write down the speedup ratios as floats with '''exactly two digits of precision''', measured as time_for_baseline / time_for_your_version (<1 = slower, >1 = faster).
In the columns 7+8, give details about your programming language and your machine specifications.
In the last column '''briefly''' describe the improvements you implemented.

|| |||| ''Average Runtime (in µs)'' |||||| ''Speedup ratio'' |||| || ||
||'''Name''' || '''Baseline''' || '''Your version''' || '''existence + bielefeld''' ||'''them + bielefeld'''||'''them + existence'''||'''Language'''||'''Machine Spec'''||'''Summary Improvements'''||
|| ck1028    || ?              || ?                  || 0.00                        || 0.00                 || 0.00                 || Java         || ?                || ?                          ||
|| ck1028    || ?              || ?                  || 0.00                        || 0.00                 || 0.00                 || C++          || ?                || ?                          ||
+Add your row to the table below, following the examples already there. In the 1st column, write your account name, or name1+name2 if you work in a group. For each intersection result, write down (1) the runtime of the baseline algorithm, (2) the runtime of your improved algorithm (both in '''micro'''seconds as an integer) and (3) the speedup ratio as float with '''exactly two digits of precision''', measured as time_for_baseline / time_for_your_algorithm (<1 = slower, >1 = faster). In the last column '''briefly''' describe the improvements you implemented.
|| ||||||<style="text-align:center">''film + bowling'' ||||||<style="text-align:center">''film + rug'' ||||||<style="text-align:center">''bowling + rug'' ||||||<style="text-align:center"> ||
||'''Name''' ||'''Baseline''' ||'''Yours''' ||'''Ratio''' ||'''Baseline''' ||'''Yours''' ||'''Ratio''' ||'''Baseline''' ||'''Yours''' ||'''Ratio''' ||'''Language''' ||'''Summary Improvements''' ||
||ck1028 ||12920µs ||8796µs ||1.46 ||8570µs ||3298µs ||2.59 ||545µs ||520µs ||1.05 ||Java ||Combination of zipper algorithm & binary search in remainder of longer list; sentinels. ||
||ck1028 ||1898µs ||1784µs ||1.06 ||1767µs ||260µs ||6.79 ||116µs ||65µs ||1.78 ||C++ ||Combination of zipper algorithm & galloping search; sentinels. ||
||he41 ||8184µs ||1465µs ||5.59 ||8957µs ||1446µs ||6.19 ||2631µs ||1575µs ||1.67 ||Java ||Combination of zipper algorithm & galloping search; sentinels; Bitwise Operations. ||
||ma269 ||1901µs ||1538µs ||1.24 ||1332µs ||566µs ||2.35 ||122µs ||52µs ||2.32 ||C++ ||Log(n)-step baseline or galloping search with sentinels. ||
||cb382 + mz111 ||4842µs ||2992µs ||1.62 ||5428µs ||1487µs ||3.65 ||1687µs ||803µs ||2.10 ||Java ||Combination of zipper with sentinels & galloping search ||
||yl100 ||2061µs ||1943µs ||1.06 ||1381µs ||483µs ||2.86 ||141µs ||66µs ||2.14 ||C++ ||Combination of zipper ,sentinels, and galloping search ||
||fk234 ||2127µs ||1670µs ||1.27 ||1896 ||466 ||4.07 ||146µs ||91µs ||1.60 ||C++ ||Zipper algorithm with sentinels and galloping search ||
||pk104 ||1514µs ||1318µs ||1.14 ||1293 ||355 ||3.65 ||95µs ||50µs ||1.87 ||C++ ||galloping search ||
||pg152 ||17024µs ||11518µs ||1.47 ||12301µs ||3078µs ||3.99 ||4777µs ||1334µs ||3.58 ||Java ||Binsearch at beginning, Galloping at end ||
||dd74 ||1785µs ||1951µs ||0.91 ||1631µs ||575µs ||2,84 ||144µs ||143µs ||1.01 ||C++ ||Zipper algorithm with sentinels, binary search ||
||je113 ||2049µs ||1872µs ||1.09 ||1124µs ||497µs ||2,26 ||90µs ||89µs ||1.01 ||Java ||Skip pointers with sentinels ||
||ck407 ||30959µs ||28967µs ||1.07 ||2102µs ||1168µs ||1.80 ||1447µs ||1098µs ||1.32 ||Java ||Combination of zipper with sentinels and galloping search. ||
||sm362 ||1854µs ||1831µs ||1.01 ||1549µs ||432µs ||3.58 ||127µs ||81µs ||1.57 ||C++ ||Combination of zipper algorithm & galloping search ||
||ak745 ||6292µs ||5245µs ||1.20 ||6060µs ||1026µs ||5.91 ||1893µs ||790µs ||2.40 ||Java ||Combination of Galloping search and binary search. ||
||yb36  ||1443µs ||1271µs ||1.14 ||1374µs ||227µs ||6.03 ||133µs || 38µs ||3.47 ||C++ ||Zipper + Galloping search + Binary search + Sentinels ||

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Results for Exercise Sheet 3 (Intersecting Lists)