Run 9 Oct 2026

10 emulators 1,266 tests

Results as of this run. The arrow shows each target's movement since the previous run it was tested in.

What changed in the suite this run

Suite on 9 Oct 2026

3.6.0 was cut but never published. eu-west-2 changed how it validates TransactWriteItems while the 3.6.0 measurement was running, so five tests failed against DynamoDB itself and no board was produced. This release carries the fix, and the changes listed under 3.6.0 are first measured here.

eu-north-1 and ap-northeast-2 made the change first, and eu-west-2 followed on 2026-10-08, between two runs on main 30 minutes apart. The three now check a transaction's request before running it. An empty TransactItems gets the validation framework's generic constraint message. A 32-level value in the request is refused with a top-level ValidationException, where the transaction used to cancel on it or go on to evaluate the condition. A transacted Update that UpdateItem's statement-sized rule refuses is refused the same way, where it used to be stored. The other 30 regions still answer as before.

The five tests accept either answer, exactly, until the regions settle. No engine loses a test over it, and on the 3.5.0 board's results the engines that already refuse a 32-level value up front pass tests they used to fail: three for LocalStack, and one each for DynamoDB Local, ExtendDB and ExtendDB (SQLite). The tests keep their names, which describe what the 30 regions do, until one answer is pinned, because a rename needs every committed results file re-run.

Scored against 33 real regions. 1 dropped, out of scoring until it returns: me-south-1

DynamoDB

live (AWS)

Runs via: AWS service

Grade baseline

0.0%Divergence

100.0%Coverage

no divergence in all 33 regions

ground truth

Tier breakdown

Tier 1 · Core 0.0% diverges

100.0% covered

Tier 2 · Complete 0.0% diverges

100.0% covered

Tier 3 · Strict 0.0% diverges

100.0% covered
Floci

e97cd0c1dc2a 7 unsupported ; covers 99.4% of the suite

Runs via: Docker, Homebrew, install script, Scoop, binary, JAR

Grade A

0.1%Divergence

99.4%Coverage

low divergence (0.1%) in 26 regions · up to 1.3% in the other 7

diverged 14.2 percentage points less, grade C to A

Tier breakdown

Tier 1 · Core 0.0% diverges

100.0% covered

Tier 2 · Complete 0.0% diverges

98.0% covered 7 unsupported

Tier 3 · Strict 0.2% diverges

100.0% covered
Dynoxide

1.2.1 14 unsupported ; covers 98.9% of the suite

Runs via: npx, Docker, Homebrew, binary, npm, cargo, embedded, GitHub Action, source

Maintained by the board’s author

Grade A

0.8%Divergence

98.9%Coverage

low divergence (0.8%) in 26 regions · up to 1.7% in the other 7

unchanged

Tier breakdown

Tier 1 · Core 0.0% diverges

100.0% covered

Tier 2 · Complete 0.0% diverges

95.9% covered 14 unsupported

Tier 3 · Strict 2.4% diverges

100.0% covered
Also built for WebAssembly / OPFS
- WebAssembly / OPFS
  
  Grade A
  
  low divergence (0.2%) in 26 regions · up to 1.0% in the other 7 · covers 88.0%
ExtendDB

v0.1.13 267 unsupported ; covers 78.9% of the suite

Runs via: source

Grade B

1.8%Divergence

78.9%Coverage

low divergence (1.8%) in 26 regions · up to 2.2% in the other 7

coverage lowers this row to B

diverged 0.1 percentage points less

Tier breakdown

Tier 1 · Core 0.0% diverges

100.0% covered

Tier 2 · Complete 0.0% diverges

33.6% covered 229 unsupported

Tier 3 · Strict 5.4% diverges

91.1% covered 38 unsupported
Also built for SQLite
- SQLite
  
  Grade B
  
  low divergence (2.1%) in 26 regions · up to 2.4% in the other 7 · covers 83.0% · coverage lowers this row to B
LocalStack

2026.9.1 54 unsupported ; covers 95.7% of the suite

Runs via: Docker, pip, Homebrew, binary

Grade A

2.4%Divergence

95.7%Coverage

low divergence (2.4%) in 26 regions · up to 3.6% in the other 7

diverged 5.1 percentage points less, grade B to A

Tier breakdown

Tier 1 · Core 0.0% diverges

100.0% covered

Tier 2 · Complete 6.1% diverges

89.0% covered 38 unsupported

Tier 3 · Strict 2.4% diverges

96.2% covered 16 unsupported
Ministack

92e9110653e4 52 unsupported ; covers 95.9% of the suite

Runs via: pip, Docker, source

Grade B

6.6%Divergence

95.9%Coverage

moderate divergence (6.6%) in 1 region · up to 7.9% in the other 32

diverged 0.2 percentage points less

Tier breakdown

Tier 1 · Core 0.0% diverges

100.0% covered

Tier 2 · Complete 0.3% diverges

89.6% covered 36 unsupported

Tier 3 · Strict 19.5% diverges

96.2% covered 16 unsupported
Dynalite

4.0.0 398 unsupported ; covers 68.6% of the suite

Runs via: npm, npx, embedded

Grade C

10.7%Divergence

68.6%Coverage

moderate divergence (10.7%) in 2 regions · up to 11.9% in the other 31

coverage lowers this row to C

unchanged

Tier breakdown

Tier 1 · Core 10.7% diverges

100.0% covered

Tier 2 · Complete 8.1% diverges

11.6% covered 305 unsupported

Tier 3 · Strict 12.9% diverges

78.1% covered 93 unsupported
DynamoDB Local

ff89bd48ff32 73 unsupported ; covers 94.2% of the suite

Runs via: Docker, JAR, Maven

Grade C

14.7%Divergence

94.2%Coverage

moderate divergence (14.7%) in 2 regions · up to 15.6% in the other 31

coverage lowers this row to C

diverged 0.1 percentage points less

Tier breakdown

Tier 1 · Core 7.5% diverges

100.0% covered

Tier 2 · Complete 15.4% diverges

83.5% covered 57 unsupported

Tier 3 · Strict 22.6% diverges

96.2% covered 16 unsupported
Kumo

76e97ef55735 271 unsupported ; covers 78.6% of the suite

Runs via: Docker, binary, source

Grade F

44.9%Divergence

78.6%Coverage

severe divergence (44.9%) in 2 regions · up to 45.6% in the other 31

unchanged

Tier breakdown

Tier 1 · Core 47.2% diverges

100.0% covered

Tier 2 · Complete 13.9% diverges

32.5% covered 233 unsupported

Tier 3 · Strict 67.3% diverges

91.1% covered 38 unsupported