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ffcd2e9faf
Themes often cache `nil` values in a DistributedCache. This bug meant that we were re-calculating some values on every request, AND triggering message-bus publishing on every request. This fix should provide a significant performance improvement for busy sites.
30 lines
707 B
Ruby
30 lines
707 B
Ruby
# frozen_string_literal: true
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require 'message_bus/distributed_cache'
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class DistributedCache < MessageBus::DistributedCache
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def initialize(key, manager: nil, namespace: true)
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super(
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key,
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manager: manager,
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namespace: namespace,
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app_version: Discourse.git_version
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)
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end
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# Defer setting of the key in the cache for performance critical path to avoid
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# waiting on MessageBus to publish the message which involves writing to Redis.
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def defer_set(k, v)
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Scheduler::Defer.later("#{@key}_set") do
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self[k] = v
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end
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end
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def defer_get_set(k, &block)
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return self[k] if hash.key? k
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value = block.call
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self.defer_set(k, value)
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value
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end
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end
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