'evalSha' is deprecated about redis

[kelunik]

@umbri What's the logic you implemented? I guess you can just use eval directly now?

It does implement the API, just not totally low-level.

@kelunik I understand that this is a feature, but for me I need that old evalSha(), as I say I have some old code that was ported from another language with a lot of tests and using old evalSha() all was fine, now I get error, I understand that I can rewrite it but I think there may be other one as me, I suggest to just mark it as @deprecated and not trigger_error()

[kelunik]

If you don't want to get deprecation warnings, you can exclude them in your error reporting setting or explicitly silence your call to evalSha.

We could maybe talk about not deprecating it at all, but given that it newer worked correctly, I don't see a lot of advantage in that.

I am worry of this extra call for sha1() https://github.com/amphp/redis/blob/master/lib/Redis.php#L1923

I am calling evalSha() very often, 90% off all calls to Redis

[kelunik]

We could optimize that and include a lookup cache.

<?php

$cache = [];

function bench(string $script) {
    global $cache;

    // version without cache: return \sha1($script);

    if (isset($cache[$script])) {
        return $cache[$script];
    }

    $sha1 = \sha1($script);
    $cache[$script] = $sha1;

    return $sha1;
}

$start = \microtime(true);

for ($i = 0; $i < 1000000; $i++) {
    bench("foobar = foobar = foobar = foobar = foobar;");
}

var_dump(\microtime(true) - $start);

kelunik@kelunik ❯ ~ ❯ 18:12:25 ❯ 
$ php test.php # with cache
float(0.05865216255188)

kelunik@kelunik ❯ ~ ❯ 18:12:38 ❯ 
$ php test.php # without cache
float(0.33159995079041)

#51

[kelunik]

Closing, as https://github.com/amphp/redis/releases/tag/v0.3.3 has been released with a script cache.