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Table 3 Computational results for Example 5.1 with \(\pmb{(N,M)=(200,250)}\)

From: Simultaneous and semi-alternating projection algorithms for solving split equality problems

J

50

100

150

200

250

Algorithm 1.1

Iter.

3477

6828

15,749

48,555

255,440

Inlt.

11,943

21,084

60,677

336,456

1,326,061

Sec.

1.688

3.844

12.672

67.453

334.891

Algorithm 1.2

Iter.

10,464

21,319

32,055

122,743

483,468

Inlt.

30,876

86,575

162,387

420,341

2,185,371

Sec.

5.281

16.063

32.156

111.891

600.625

Algorithm 1.3

Iter.

648

6647

16,810

44,817

132,873

Sec.

0.188

2.781

9.500

32.734

118.203

FISTA

Iter.

2346

2931

4040

3804

6977

Inlt.

2355

2941

4051

3815

6989

Sec.

0.500

0.750

1.250

1.344

3.141

Algorithm 3.1(I)

Iter.

109

236

343

814

2077

Inlt.

151

278

415

975

2518

Sec.

0.031

0.094

0.188

0.344

7.078

Algorithm 3.1(II)

Iter.

168

188

262

756

1106

Inlt.

180

200

268

792

1142

Sec.

0.063

0.109

0.125

0.218

0.438

Algorithm 3.2(I)

Iter.

117

168

818

1718

1725

Inlt.

128

222

986

2000

2408

Sec.

0.063

0.063

0.438

1.063

1.281

Algorithm 3.2(II)

Iter.

82

83

373

582

1240

Inlt.

98

108

400

644

1285

Sec.

0.031

0.078

0.199

0.406

0.563