`(CaseClauseError) no case clause matching: nil` for some lookups about tz HOT 10 CLOSED

Hi! Will look at it thank you!

from tz.

Hey there. Any updates on this? I've not had time myself to dig deeper, understandable if you haven't had time either.

from tz.

iex(1)> DateTime.now!("America/Argentina/Salta", Tz.TimeZoneDatabase)
#DateTime<2021-09-21 09:45:52.535000-03:00 -03 America/Argentina/Salta>

elixir --version
Erlang/OTP 22 [erts-10.7] [64-bit] [smp:12:12] [ds:12:12:10] [async-threads:1]
Elixir 1.11.3 (compiled with Erlang/OTP 21)

Any thoughts? Can you run it now?

from tz.

Upgraded elixir/erlang, still working fine

Erlang/OTP 24 [erts-12.0] [source] [64-bit] [smp:12:12] [ds:12:12:10] [async-threads:1] [jit]
Elixir 1.12.3 (compiled with Erlang/OTP 22)

from tz.

The error is cause by the option :reject_time_zone_periods_before_year. Removing this option will prevent the error.
That will be a quick solution before I fix it.
Note that I don't even know if this option is worth it with the newer version of Tz because I think it might make no difference memory-wise. It needs to be measured (I just don't know how yet). Also this option was more intended for embedded devices that have a very limited amount of memory.

from tz.

Ah yes, apologies, I should have mentioned that I'm using that option.

It's the main reason I'm looking to switch to Tz: right now I'm using Tzdata but I'm running in a memory-restricted environment. I'm looking for something with a smaller memory footprint, and I only care about dates in the future, so Tz with the reject option looked perfect for my needs.

from tz.

Are you able to measure the memory footprint?

from tz.

Fixed in 0.20.1

from tz.

Still interested to know if you can measure memory footprint:)

from tz.

Confirmed: fixed for me. Thanks @mathieuprog.

FYI, here are some results from a naïve benchmark for my use-case on my local machine:

Operating System: macOS
CPU Information: Intel(R) Core(TM) i9-9980HK CPU @ 2.40GHz
Number of Available Cores: 16
Available memory: 64 GB
Elixir 1.12.0
Erlang 24.0.1

Benchmark suite executing with the following configuration:
warmup: 2 s
time: 30 s
memory time: 30 s
parallel: 4
inputs: none specified
Estimated total run time: 2.07 min

Benchmarking Tz...
Benchmarking Tzdata...

Name             ips        average  deviation         median         99th %
Tz            8.82 K      113.38 μs    ±52.02%       77.99 μs      324.99 μs
Tzdata        4.88 K      204.99 μs    ±17.63%      196.99 μs      352.99 μs

Comparison:
Tz            8.82 K
Tzdata        4.88 K - 1.81x slower +91.61 μs

Memory usage statistics:

Name           average  deviation         median         99th %
Tz            13.91 KB     ±0.09%       13.90 KB       13.95 KB
Tzdata        99.90 KB     ±0.09%       99.86 KB      100.09 KB

Comparison:
Tz            13.90 KB
Tzdata        99.90 KB - 7.18x memory usage +86.00 KB

My config is:

config :elixir, :time_zone_database, Tz.TimeZoneDatabase
config :tz, reject_time_zone_periods_before_year: 2019

from tz.